Issued on Thursday 21st November 2024, valid until further notice
OVERVIEW
Storm Bert becomes the second storm of the 2024/2025 season, bringing another change to the weather this weekend – much wetter and windier.
An ADVISORY has been issued for Ireland, together with a nationwide yellow wind and rain warning for Friday night into Saturday, which is the start of the event.
Further weather warnings will follow.
Why have we named it? Bert is a low-pressure system currently forming in the Atlantic. When it moves closer to Ireland it will displace the current cold Artic air introducing very strong winds and heavy rain.
Potential impacts considered at the moment are localised flooding, dangerous travelling conditions, displaced objects, fallen trees. Main impacts are expected on Saturday and Sunday, but there’s potential for lasting impacts into early next week.
We are closely monitoring the situation and will provide updated information as Met Éireann’s high resolution model (2 days ahead) gives more detailed information.
METEREOLOGICAL SITUATION
This weekend, Storm Bert will move close to Ireland, displacing the recent cold Artic airmass. Very strong winds and heavy rain will track north eastwards over the country on Friday night (yellow wind and rain warnings issued nationwide), which will continue right through the weekend.
Figure 1 – 6 hour rainfall forecast showing heavy rain sweeping across the country on Friday night (22nd November) into Saturday (23rd November), following by heavy scattered showers on Sunday (24th November) and Monday (25th November).
Meteorologist Andrew Doran-Sherlock says: “Storm Bert will bring milder but very wet and windy conditions for the weekend. Heavy rain on Saturday and Sunday will likely lead to localised flooding in urban areas and some river catchments particularly in the west and southwest, as this rain is falling on already saturated and waterlogged ground.
We are monitoring the situation closely and will upgrade/issue warnings as Met Éireann’s high resolution model (which provides information 2-days ahead) is analysed.
There’s strong likelihood of status orange wind warnings in western and northwestern counties. The impacts from Storm Bert will commence later on Friday and will continue through the weekend and potentially through early next week as well.”
Figure 2 – 3 hour mean winds and max gusts. The colours represent wind warning levels for gusts from Friday afternoon (22nd November) to Monday night (25th November).
HOW TO STAY SAFE IN EXTREME WEATHER
Stay up-to date with the forecast and the warnings for your county on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
Check in with your local authority and emergency management stakeholders (Irish Coast Guards, Gardaí, etc) via their websites and social channels to see how your area will be/is affected.
Ensure your mobile is phone is fully charged to enable communication in advance of the event and keep local emergency numbers in your phone.
Keep a small amount of food, medical and water supplies in case it’s dangerous to step out of the home.
Advance planning for flooding: You can consult the OPW flood maps, which show areas that may be at risk of flooding based on historical data (see www.floodinfo.ie).
Stay away from coastal areas during the period. Remember the advice from the Irish Coast Guard: “Stay Back, Stay High, Stay Dry”.
Don’t try to walk, cycle or drive through flooded areas, the depth of the water can be deceiving.
Remember: As little as 150mm of fast-flowing water can knock you off your feet and 300mm of fast-flowing water can move most cars off the road.
While on the road in strong winds, beware of fallen trees or other debris and high sided vehicles, particularly when overtaking. If you are driving a high sided vehicle, try to anticipate exposed sections of roadway where winds will be stronger.
ESB Networks is highlighting the dangers posed by fallen live wires and advises the public and the emergency services to stay away from fallen cables and to report such cases immediately. ESB Emergency Services can be contacted at 1800 372 999.
You can monitor www.powercheck.ie in regards to power restoration times
“Be Winter Ready”: Follow recommendations before, during and after the event on gov.ie – Be Winter Ready (www.gov.ie)
NOTE THAT:
The warnings are likely to be updated. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any warnings’ updates.
The timing and location of extreme weather occurrences can significantly affect their impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and level of impacts can be strongly affected by previous weather conditions. When issuing a warning, Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions that may increase the level of impact expected for particular areas.
WHY AND HOW ARE STORMS NAMED?
Storms are named when they could cause ‘medium’ or ‘high’ impacts in one of the three partner countries. This enables consistent, authoritative messaging to the public and other stakeholders to help them to prepare for and stay safe during potentially severe weather events.
Since 2015, Met Éireann and the UK Met Office have been working together on the naming programme and were joined by the Netherlands’ KNMI in 2019, to form the ‘western group’ of European weather services.
When a storm is forecast, the national weather service that expects the biggest impact from the severe weather to hit its region, or is likely to be first affected by it, names the storm. Storm naming happens in conjunction with orange/red weather warnings, which could be for wind, rain or snow, or a combination of these conditions. Those warnings are, in turn, issued based on a combination of numerical thresholds and the potential impacts foreseen.
HOW ARE STORM NAMES CHOSEN?
Met Éireann, the UK Met Office and KNMI publish a new list of storm names for each Storm Season, which commences on 1st September.
This 2024/25 season, each of the three meteorological services contributed seven names to the season’s list. Met Éireann’s contributions to this year’s list were taken from more than 500 suggestions by primary school children participating in ESB Science Blast last February.
The full 2024/25 list is Ashley, Bert, Conall, Darragh, Éowyn, Floris, Gerben, Hugo, Izzy, James, Kayleigh, Lewis, Mavis, Naoise, Otje, Poppy, Rafi, Sayuri, Tilly, Vivienne, Wren, with Met Éireann contributing the names for C, D, H, I, N, P and V (names chosen by Met Éireann in bold).
(Note – letters Q, U, X, Y, Z are not included, in line with the US National Hurricane Centre naming convention.)
PAST STORM SEASONS OVERVIEW
Last season (2023/24) there were fourteen (14) named storms affecting the area, twelve (12) of which were named by the Western Europe Group, formed by UK Met Office, KNMI and Met Éireann, and the other two (2) storms (Elisa and Geraldine) by the Southwestern Europe Group, made up of France, Portugal and Spain.
2023/24 was the season with the highest number of storms named in a season by the Western Europe Group list (12 storms)
2023/24 is the first season since the initiative began in 2015 in which an ‘L’ storm was named from the list of the Western Europe Group – Storm Lilian in August 2024.
The lowest number of named storms since the initiative began was the four (4) named in 2022/23.
Prior to the 2023/24 season, the highest number of named storms occurred in the 2015/16 and 2017/18 seasons, with eleven (11) named storms in each.
Since 2015/16, there has been an average of eight (8) named storms in each season
Season 2015/2016 remains the season with the greatest number of storms reaching Storm Force 10, as nine (9) of the eleven (11) named storms observed Storm Force 10 sustained wind speeds at Atlantic coastal stations.
During the past season 2023/24, there were three (3) named storms with Storm Force 10 sustained wind speeds or higher:
Storm Force 10 sustained (10-minute mean) wind speeds were observed during named Storm Fergus (91 km/h) and Storm Jocelyn (96 km/h), at Mace Head (coastal), Co Galway on Sunday 10th December 2023 and Tuesday 23rd January 2024 respectively.
Violent Storm Force 11 sustained wind speeds were observed at Mace Head (coastal), Co Galway during Storm Isha on Sunday 21st January 2024. Before that, Violent Storm Force winds had been last observed during Storm Eunice on Friday 18th February 2022.
No Hurricane strength sustained/mean winds at any Met Éireann wind station have been observed since the Storm Naming initiative began. Storm Ellen in August 2020 came very close to observing winds of this strength, with 111 km/h at Roches Point, Co Cork. The last hurricane force winds affecting Ireland were observed during Storm Darwin on Wednesday 12th February 2014. Hurricane force winds have been observed at coastal western stations, mainly in January (half the time), twice in December and once in February, March and September.
It is not uncommon to have storms named in the month of October. Since the naming initiative started, 5 out of 9 seasons have had October storms, including Ophelia on 16th October 2017 and Babet last year. Prior to storm Ashley, a total of 7 storms have impacted Ireland in October, since 2015.
For more information on storm names and past storms, see Storm Centre and Major Weather Events
Updated on Wednesday20th November 2024, valid until further notice
OVERVIEW
Heavy snow, Wednesday evening and overnight: significant snowfall accumulations, across parts of Munster, Connacht and the midlands. Heavy rain will transition to sleet and snow this evening and tonight (Wednesday) and will continue through Thursday morning, with accumulations of 5cm or more in 12 hours likely. This will cause significant travel disruptions and difficult ground conditions during the day, especially during morning rush hour. A status orange snow warning has been issued for multiple counties.
Lower snow accumulations are expected in other counties under a yellow snow/ice warning through Wednesday evening and night and into Thursday morning, with accumulations of 1-5cm in 12 hours likely. Travel disruptions can also be expected in these areas.
The cause of snow: A low-pressure system skirting to the south of Ireland will bring warm moist air up over cold air at the surface. This interaction will cause the widespread rain brought by the low to transition to sleet and snow in most areas.
Heavy rain possible: The rain may not transition to sleet or snow in all areas of the south, so some surface water accumulations could be expected, leading to localised flooding.
Warnings have been issued to reflect the situation; these may be updated as the situation evolves, as snow set-ups always have a level of inherent uncertainty.
For the rest of Ireland, the cold weather continues, bringing low temperatures, especially at night with widespread frost and ice. Showers of sleet and snow can also be expected, but not at warning levels.
The weekend: We are monitoring the track of another low-pressure system which will bring unsettled weather for Ireland on the weekend. A storm has not been named at this time, but we are closely monitoring the situation.
Fig 1 – Low pressure system approaching Ireland from the southwest this evening (Wednesday 20th). The interaction of this low with thecold air already over us will cause its heavy rain, transitioning to sleet and snow.
Fig 2 – Surface Air Temperatures and Freezing Level (the level in the atmosphere at which the temperature is zero) indicating that the cold temperatures will stay with us through the next couple of days.
HOW TO STAY SAFE DURING WINTRY WEATHER – BE WINTER READY
Stay up-to date with the forecast and the warnings on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
Driving conditions will be hazardous, even where roads are gritted: Slow down, drive with caution, allow more time for breaking, be aware of other road users and allow extra time for your journey.
Take extra care while walking: footpaths etc. can be extremely hazardous/slippery due to ice.
Check on elderly, vulnerable and isolated neighbours.
Keep your phone charged and take it with you on all journeys. In an emergency dial 999 or 112.
ESB Emergency Services can be contacted at 1800 372 999.
You can monitor www.powercheck.ie in regards to power restoration times
Warnings have now been issued as temperatures turn significantly colder with showers of sleet and snow expected. Frosty and icy nights too.
Keep up to date with met.ie for updates and any further warnings that may be issued over the coming days.
A weather advisory is still in place until the end of the week.
Potential Impacts:
Difficult travelling conditions
Poor visibility in wintry showers
Travel disruption
METEOROLOGICAL SITUATION
Turning cold across Ireland tonight as an Arctic airmass becomes established over the country which looks set to persist for several days.
Fig 1- Airmass temperatures showing cold Arctic air sinking over the country. ECMWF 00z Run Monday 18th of November.
Meteorologist Rebecca Cantwell says:
“This evening and tonight rain will meet colder air in Ulster and parts of north Connacht turning to sleet and snow in some areas. This will bring tricky travelling conditions as visibility is greatly reduced in wintery showers.
As the rain clears through tonight and tomorrow, the cold arctic air will move southwards over the country. So, a notably colder day tomorrow but brightening up too with some sunshine. It will continue cold right through the working week with daytime temperatures struggle to rise above 2 to 6 degrees and temperatures falling widely below freezing at night. We’ll see a widespread frost developing and icy stretched too, leading to slippery conditions under foot and possibly travel disruption in some areas.”
Rebecca continues:
“That northerly airflow will also bring scattered showers of rain, sleet and snow through the week and with those cold temperatures, that precipitation will tend to freeze, increasing icy conditions, so do take care when out and about”
Fig 2- Surface temperatures dropping by day and night next week. ECMWF 00z Run Monday 18th November.
Looking ahead towards the end of the week, there is a chance of some rain, sleet or snow moving into the south on Thursday with the possibility of some wet and windy weather on the weekend but a high degree of uncertainty at this time.
Stay up-to date with the forecast and any updates to the warnings on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
The meteorological information provided below (see “Overview”) is still valid and Storm Ashley has been confirmed as a rapid deepening or explosive cyclogenesis system. It is worth emphasising the complex scenario Storm Ashley will bring to coastal areas of the country, especially as it coincides with to some of the highest tides of the year.
Storm Ashley will also bring spells of heavy rain on Sunday, which is likely to lead to localised flooding in urban areas and small river catchments, as this rain is falling on already saturated and waterlogged ground.
In view of all this, Met Éireann has updated the weather warnings in place for Sunday and added a new yellow rainfall warning (see latest warnings here). Therefore, it is important to re-emphasize the main impacts expected:
Coastal flooding: Storm Surges are expected to reach between 0.5m to 1m on Sunday combined with onshore waves and exceptionally high spring tides. Limerick, Clare, Galway, Mayo, Sligo, Leitrim and Donegal coastlines will be particularly at risk for coastal flooding including wave overtopping in low-lying and exposed areas across all day Sunday.
Large coastal waves: Due to the strong winds, between 1m to 3m waves are forecast in the western bays on Sunday, with offshore waves reaching up to 10 m. This will add to the likelihood of coastal flooding.
Dangerous conditions at sea
Localised flooding due to heavy rainfall falling on already saturated and waterlogged ground
Flying debris, loose objects displaced
Fallen trees
Very difficult travelling conditions
Damage to power lines, power outages
Damage to already weakened structures
Please remember to “Stay Back, Stay High, Stay Dry” at all times during this event and have a look at the below section “How to Stay Safe in Extreme Weather” for detailed public authorities’ advice.
The following information is valid on Friday 18th October 2024 and until further update
OVERVIEW
Storm Ashley has been named by Met Éireann, becoming the first storm of the 2024/2025 season.
Storm Ashley is a low-pressure system currently developing in the western North Atlantic, on the southern side of the Jet Stream. It is expected to travel quickly eastwards over the Atlantic this weekend, crossing to the northern side of the Jet Stream, becoming positioned in the left exit region (a developmental area of the Jet) which will cause it to undergo rapid deepening later on Saturday.
Fig 1- ECMWF 00z Run Friday 18th Oct showing atmospheric pressure (black lines) overlayed with the Jet Stream (purple colour), showing how the jet stream will deepen Ashley over the weekend into a storm depression and steer it to the northwest of Ireland and the UK (see Sunday slide below)
The system will become a storm depression as it swings up to the west and northwest of Ireland on Saturday night and Sunday.
Fig 2– ECMWF 00z Run Friday 18th Oct showing atmospheric pressure (black lines) overlaid with the Jet Stream (purple colour), showing Storm Ashley in on the northern part of the jet stream, impacting Ireland and the UK on Sunday.
Met Éireann’s meteorologist Liz Walsh, says:
“Storm Ashley will bring strong southerly winds overnight on Saturday night and early Sunday with a second wave of even stronger south-westerly winds, accompanied by damaging gusts across the country, from mid-morning on Sunday, right though the afternoon and into the evening in some parts.”
She continues:
“We are currently in a period of exceptionally high spring tides, and this, tied in with the strong winds and high waves, will substantially increase the risk of coastal flooding, especially along Atlantic coasts”.
At this time, Met Éireann has issued an OrangeWind Warning for some western counties and a Yellow Wind Warning for Ireland, for Sunday, but the warnings are likely to be updated as more information from our high-resolution models comes in and is analysed by our meteorologists(latest warnings here).
KEY INFORMATION – SUMMARY OF IMPACTS
The potential impacts of Storm Ashley are:
Coastal flooding: Storm Surges are expected to reach between 0.5 metre to 1 metre on Sunday evening combined with onshore waves and high tides Clare, Galway and Mayo Coastlines will be particularly at risk for coastal flooding including wave overtopping in low-lying and exposed areas.
Large coastal waves: Due to the strong winds between 1m to 3m are forecast in the western bays on Sunday, with offshore waves reach up to 10m. This will add to the like hood of coastal flooding.
Dangerous conditions at sea
Flying debris, loose objects displaced
Fallen trees
Very difficult travelling conditions
Damage to power lines, power outages
Damage to already weakened structures
NOTE THAT:
The warnings are likely to be updated. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any warnings’ updates.
The timing and location of extreme weather occurrences can significantly affect their impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and level of impacts can be strongly affected by previous weather conditions. When issuing a warning, Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions that may increase the level of impact expected for particular areas.
HOW TO STAY SAFE IN EXTREME WEATHER
Stay up-to date with the forecast and the warnings for your county on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
Check in with your local authority and emergency management stakeholders (Irish Coast Guards, Gardaí, etc) via their websites and social channels to see how your area will be/is affected.
Ensure your mobile is phone is fully charged to enable communication in advance of the event and keep local emergency numbers in your phone.
Keep a small amount of food, medical and water supplies in case it’s dangerous to step out of the home.
Advance planning for flooding: You can consult the OPW flood maps, which show areas that may be at risk of flooding based on historical data (see www.floodinfo.ie).
Stay away from coastal areas during the period. Remember the advice from the Irish Coast Guard: “Stay Back, Stay High, Stay Dry”.
Don’t try to walk, cycle or drive through flooded areas, the depth of the water can be deceiving.
Remember: As little as 150mm of fast-flowing water can knock you off your feet and 300mm of fast-flowing water can move most cars off the road.
While on the road in strong winds, beware of fallen trees or other debris and high sided vehicles, particularly when overtaking. If you are driving a high sided vehicle, try to anticipate exposed sections of roadway where winds will be stronger.
ESB Networks is highlighting the dangers posed by fallen live wires and advises the public and the emergency services to stay away from fallen cables and to report such cases immediately. ESB Emergency Services can be contacted at 1800 372 999.
You can monitor www.powercheck.ie in regards to power restoration times
Storms are named when they could cause ‘medium’ or ‘high’ impacts in one of the three partner countries. This enables consistent, authoritative messaging to the public and other stakeholders to help them to prepare for and stay safe during potentially severe weather events.
Since 2015, Met Éireann and the UK Met Office have been working together on the naming programme and were joined by the Netherlands’ KNMI in 2019, to form the ‘western group’ of European weather services.
When a storm is forecast, the national weather service that expects the biggest impact from the severe weather to hit its region, or is likely to be first affected by it, names the storm. Storm naming happens in conjunction with orange/red weather warnings, which could be for wind, rain or snow, or a combination of these conditions. Those warnings are, in turn, issued based on a combination of numerical thresholds and the potential impacts foreseen.
HOW ARE STORM NAMES CHOSEN?
Met Éireann, the UK Met Office and KNMI publish a new list of storm names for each Storm Season, which commences on 1st September.
This 2024/25 season, each of the three meteorological services contributed seven names to the season’s list. Met Éireann’s contributions to this year’s list were taken from more than 500 suggestions by primary school children participating in ESB Science Blast last February.
The full 2024/25 list is Ashley, Bert, Conall, Darragh, Éowyn, Floris, Gerben, Hugo, Izzy, James, Kayleigh, Lewis, Mavis, Naoise, Otje, Poppy, Rafi, Sayuri, Tilly, Vivienne, Wren, with Met Éireann contributing the names for C, D, H, I, N, P and V (names chosen by Met Éireann in bold).
(Note – letters Q, U, X, Y, Z are not included, in line with the US National Hurricane Centre naming convention.)
PAST STORM SEASONS OVERVIEW
Last season (2023/24) there were fourteen (14) named storms affecting the area, twelve (12) of which were named by the Western Europe Group, formed by UK Met Office, KNMI and Met Éireann, and the other two (2) storms (Elisa and Geraldine) by the Southwestern Europe Group, made up of France, Portugal and Spain.
2023/24 was the season with the highest number of storms named in a season by the Western Europe Group list (12 storms)
2023/24 is the first season since the initiative began in 2015 in which an ‘L’ storm was named from the list of the Western Europe Group – Storm Lilian in August 2024.
The lowest number of named storms since the initiative began was the four (4) named in 2022/23.
Prior to the 2023/24 season, the highest number of named storms occurred in the 2015/16 and 2017/18 seasons, with eleven (11) named storms in each.
Since 2015/16, there has been an average of eight (8) named storms in each season
Season 2015/2016 remains the season with the greatest number of storms reaching Storm Force 10, as nine (9) of the eleven (11) named storms observed Storm Force 10 sustained wind speeds at Atlantic coastal stations.
During the past season 2023/24, there were three (3) named storms with Storm Force 10 sustained wind speeds or higher:
Storm Force 10 sustained (10-minute mean) wind speeds were observed during named Storm Fergus (91 km/h) and Storm Jocelyn (96 km/h), at Mace Head (coastal), Co Galway on Sunday 10th December 2023 and Tuesday 23rd January 2024 respectively.
Violent Storm Force 11 sustained wind speeds were observed at Mace Head (coastal), Co Galway during Storm Isha on Sunday 21st January 2024. Before that, Violent Storm Force winds had been last observed during Storm Eunice on Friday 18th February 2022.
No Hurricane strength sustained/mean winds at any Met Éireann wind station have been observed since the Storm Naming initiative began. Storm Ellen in August 2020 came very close to observing winds of this strength, with 111 km/h at Roches Point, Co Cork. The last hurricane force winds affecting Ireland were observed during Storm Darwin on Wednesday 12th February 2014. Hurricane force winds have been observed at coastal western stations, mainly in January (half the time), twice in December and once in February, March and September.
It is not uncommon to have storms named in the month of October. Since the naming initiative started, 5 out of 9 seasons have had October storms, including Ophelia on 16th October 2017 and Babet last year. Prior to storm Ashley, a total of 7 storms have impacted Ireland in October, since 2015.
The following information is valid on Thursday, 17th October 2024 and until further update.
Summary – A weather advisory has been issued for Ireland
This Friday, a brief period of heavy rain and strong winds across the country is expected.
We are monitoring another low-pressure system which could undergo rapid deepening on Saturday with the potential for strong winds and potentially a named storm; however, uncertainty still exists about this event.
Additionally, we are currently in one of the highest Spring tides of the year and this, tied in with any strong winds and high waves will increase the risk of coastal flooding.
Weather warnings for Saturday/Sunday, related to the Advisory issued for Ireland today,will be issued starting tomorrow, Friday 18thOctober, when Met Éireann’s high–resolution model provides an updated situation about the evolution of the low pressure system, and our meteorologists analyse it.
Meteorological situation
The Jet Stream is expected to become very active across the Atlantic later this week and into this weekend which allowing it to pick up low-pressure systems and deepen them as they cross the Atlantic. The first low pressure system of interest (Figure 1 forecast time 12Z on Friday) is currently off the coast of Newfoundland, (Canada) as of Wednesday 16th October, and this system will undergo a period of deepening as it tracks towards Iceland by Friday night. Even though the low itself won’t impact us directly, an associated active frontal system will move eastwards over Ireland on Friday. All areas are likely to see a brief period of heavy rain and strong winds during the day on Friday.
We are currently in one of the highest Spring tides of the year and unusually high tides mean coastal flooding is possible. These exceptionally high Spring tides are due to the current proximity of the moon to the earth leading to an increased gravitational pull. Given the high astronomical tides any strong winds and high waves will increase the risk of coastal flooding, especially along Atlantic coasts.
Fig 1- Wind and Temperature forecasts at 300 hPa and the Geopotential at 500 hPa
However, our meteorologists’ gaze is also turning towards a different area of low pressure (see Figure 2 below, forecast time 00Z on Sunday), which will be developing in the western North Atlantic, about 500 nautical miles southwest of Nova Scotia. This low-pressure system is expected to travel quickly eastwards over the Atlantic this weekend. Current guidance suggests that this low will be on the southern side of the Jet Stream on Friday and will then cross over to the northern left exit region of the Jet Stream on Saturday. This system is then expected to undergo a period of rapid deepening, creating a storm depression as it swings up to the northwest of Ireland around Saturday night or Sunday morning.
Fig 2: Wind and Temperature forecasts at 300 hPa and the Geopotential at 500 hPa
“There is still a lot of uncertainty in the details at this time, but the potential is there for strong winds and therefore a named storm on Saturday night into Sunday” said Liz Walsh, Met Éireann Meteorologist.
Updated information can be expected as the situation evolves and we analyse model data. Keep up to date with the forecast through your usual channels and for live updates, check met.ie or the Met Éireann app.
UPDATE ON THE HEAVY RAINFALL EVENT FORECAST FOR the weekend of 5th-6th OCTOBER
The following information is valid at 15:30, Friday 4th October 2024 until further updates.
The meteorological situation described yesterday (below) is still valid, with a band of rain expected to trail over the country from Friday night (4th October) through to Saturday night (5th October), with the heaviest and most persistent rain forecast over the southwest and west of the country, particularly over counties Kerry and Cork.
The low pressure system will be slow moving and updates from our models this morning have led to a revision of the warnings issued yesterday. The orange rainfall warnings for Kerry and Cork have been extended for an additional hour to midnight on Saturday (valid from 00:00 Saturday 5th to 00:00 Sunday 6th). Waterford has also been elevated to an orange rainfall warning, valid from 12:00 Saturday to 00:00 Sunday. This is due to a combination of factors: heavy rainfall in mountainous regions, soil conditions which have not recovered from last weekend’s rainfall and the heaviest of the rain coinciding with high tide. All this coupled with fresh to strong onshore winds which will exacerbate river levels.
Figure 1 – Rainfall warnings issued by Met Éireann for Saturday 5th October (valid at time of writing on Friday 4th October)
Accumulations of 30-50 mm over 24h are likely in the counties under yellow warning, however rainfall amounts may be higher on windward slopes of the mountains in west Galway and west Mayo. Parts of Cork, Kerry and Waterford will see totals of 50-70 mm over a 24h period, but similarly, higher accumulations can be expected in mountainous regions of west Kerry and west Cork.
Figure 2 –24 Hour Precipitation Ensemble Forecast Probability Maps, available to the public here ( 24 Hour Precipitation – Met Éireann – The Irish Meteorological Service).The image shows the probability of rainfall accumulations over certain thresholds for this Saturday 5th October to Sunday 6th October.
In view of this, updates topotential impacts expected are:
River flooding: Soils are saturated in some places and river levels are currently low but will respond notably to the amount of rain, with out of bank flooding expected in places. Smaller rivers, especially those prone to flash flooding in urban and upland areas, may rise quickly on Saturday and into Sunday. Rivers in the south and west, particularly in the mountainous areas of Kerry, West Cork and Limerick, as well as Galway and Mayo could be affected. Given the volume of rainfall forecast throughout the weekend, levels will potentially rise in the headwaters of larger rivers including the Lee, Munster Blackwater and Bandon. It’s important to note that rivers are likely to continue to respond and rise over the weekend and into next week with further rain expected.
Coastal flooding: We are in a period of Spring tides, although not a particularly high Spring tide. Onshore winds Saturday evening on the south coast may coincide with high tide (approx. 18:00-20:00), exacerbating rising river levels in estuarine areas, resulting in flooding. Strong onshore winds may lead to wave overtopping in exposed coastal areas.
Dangerous travelling conditions due to low visibility, surface water and potentially flooding.
Travel disruptions.
Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any updates to the warnings.
The timing and location of weather can significantly affect its impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and degree of impacts can be strongly affected by previous weather conditions. Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions, that may increase the level of impact expected for particular areas when issuing a warning.
WHAT SHOULD YOU DO PRIOR TO AND DURING EXTREME WEATHER? PUBLIC SAFETY INFORMATION AND MESSAGES FROM EMERGENCY MANAGEMENT STAKEHOLDERS
Stay up-to date with the forecast and the warnings for your county on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
Check in with your local authority and emergency management stakeholders (Irish Coast Guards, Gardaí, etc) through their website and social channels to see how your area will be/is affected.
Ensure your mobile is phone is fully charged to enable communication in advance of the event and keep local emergency numbers in your phone.
Keep a small amount of food, extra medical and water supplies in case it’s dangerous to step out of the home.
Advance planning for flooding: You can consult the OPW flood maps, which show areas that may be at risk of flooding, based on historical data (see www.floodinfo.ie).
Stay away from coastal areas during the period. Remember the advice from the Irish Coast Guard: “Stay Back, Stay High, Stay Dry”.
Don’t try to walk, cycle or drive through flooded areas, the depth of the water can be deceiving.
Remember: As little as 150mm of fast-flowing water can knock you off your feet and 300mm of fast-flowing water can move most cars off the road.
ESB Networks is highlighting the dangers posed by fallen live wires and advises the public and the emergency services to stay away from fallen cables and to report such cases immediately. ESB Emergency Services can be contacted at 1800 372 999.
You can monitor powercheck.ie in regard to power restoration times.
The following information is valid at 18:00, Thursday 3rd October 2024 until further updates.
Through Friday night (4th October) and into Saturday (5th October) a broad area of low pressure will move over Ireland introducing a milder and moist airmass. The progression of this system across Ireland will be stalled due to high pressure over central Europe. A band of rain associated with this system is expected to trail over the country through Saturday 5th October, with the heaviest and most persistent rain forecast over the southwestern and west of the country, particularly over counties Kerry and Cork.
Figure 1 – Rainfall forecast for Friday (4th October) to Sunday (6th October)
Deputy Head of Forecasting Liz Coleman said: “Friday will be a cloudy and damp day with rain and drizzle in many areas, but the impactful rain will start from Friday night onwards and the rain will be heavy and persistent in many areas for much of Saturday.
Through Saturday, high pressure in the mid-Atlantic, together with an area of low-pressure further north, will work in tandem to drag warm tropical air up over the country. As we know, the warmer the air, the higher its ability to hold moisture, so this event has the potential to be quite impactful.”
Figure 2 – Airmass Temperature and Surface Pressure chart, showing area of low-pressure (L) to the west of Ireland, working in tandem with an area of high-pressure (H) in the mid-Atlantic, which has its origin over warm seas in the tropics (dark orange and red airmass)
Liz Coleman continues: “While much of the west and southwest are forecast to receive over 30mm of rain in a 24h period, our models are currently predicting in excess of 50mm of rain over parts of southwest Kerry and west Cork, with higher accumulations possible in mountainous areas.”
Figure 3 –24 Hour Precipitation Ensemble Forecast Probability Maps, available to the public here ( 24 Hour Precipitation – Met Éireann – The Irish Meteorological Service).The image shows the probability of rainfall accumulations over certain thresholds for this Friday 4th October and Saturday 5th October.
At the time of writing, Met Éireann has issued an ORANGE rainfall warning for counties Cork and Kerry (Valid: 00:00 to 23:00 Saturday 05/10/2024) and a YELLOW rainfall warning for counties Clare, Limerick, Waterford, Galway and Mayo (Valid: 00:00 Saturday 05/10/2024 to 00:00 Sunday 06/10/2024).
In view of the situation, potential impacts expected are:
River flooding: Although river levels are generally low, soils are currently nearing saturation. Therefore, given the widespread and prolonged nature of the rain, significant river level increases are expected, with small and upland catchments at the greatest risk of flooding.
Coastal flooding: Fresh to strong southeasterly onshore winds and waves, coinciding with high tide along southern coasts on Saturday evening, could result in wave overtopping. Spring tides may prevent rivers from discharging into the sea at time of high tide, increasing the risk of flooding on coastal areas.
Dangerous travelling conditions due to low visibility, surface water and potentially flooding.
Travel disruptions.
The warnings are likely to be updated. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any warnings’ updates.
The timing and location of weather can significantly affect its impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and degree of impacts can be strongly affected by previous weather conditions. Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions, that may increase the level of impact expected for particular areas when issuing a warning.
WHAT SHOULD YOU DO PRIOR TO AND DURING EXTREME WEATHER? PUBLIC SAFETY INFORMATION AND MESSAGES FROM EMERGENCY MANAGEMENT STAKEHOLDERS
Stay up-to date with the forecast and the warnings for your county on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
Check in with your local authority and emergency management stakeholders (Irish Coast Guards, Gardaí, etc) through their website and social channels to see how your area will be/is affected.
Ensure your mobile is phone is fully charged to enable communication in advance of the event and keep local emergency numbers in your phone.
Keep a small amount of food, extra medical and water supplies in case it’s dangerous to step out of the home.
Advance planning for flooding: You can consult the OPW flood maps, which show areas that may be at risk of flooding, based on historical data (see www.floodinfo.ie).
Stay away from coastal areas during the period. Remember the advice from the Irish Coast Guard: “Stay Back, Stay High, Stay Dry”.
ESB Networks is highlighting the dangers posed by fallen live wires and advises the public and the emergency services to stay away from fallen cables and to report such cases immediately. ESB Emergency Services can be contacted at 1800 372 999.
You can monitor powercheck.ie in regard to power restoration times.
Storm Lilian has been named by the UK Met Office – what impacts can we expect in Ireland?
Below valid at 12pm on Thursday 22nd August 2024.
The low-pressure system which will deepen and become Storm Lilian over the next 24 hours can be seen in the mid-Atlantic on the 00 UTC surface analysis chart with its associated fronts.
Fig 1: Surface analysis chart 00UTC
Wind Impacts
While the main impacts associated with Storm Lilian will be felt across the UK in the early hours of tomorrow morning, Met Éireann have issued yellow level wind and rain warnings.
Forecaster Brandon Creagh said: “The centre of the low pressure system is expected to track across the middle of country tonight, bringing unseasonably strong and gusty south to southwest winds which will veer west to northwest as the system tracks eastwards.
The strongest of the winds will occur overnight but with the trees still in full leaf, people need to be careful of debris or branches on the roads tomorrow morning.”
Fig 2: Model output wind and gusts.
Gale warnings are also in effect in eastern and southern sea areas.
Ireland is currently in a period of very high tides. There is a High Tide Advisory in effect for all coasts of Ireland, expiring at 12:00 noon tomorrow, Friday, leading to the continued risk of coastal flooding and wave overtopping on coasts affected by onshore winds.
Rainfall Impacts
This system will also bring heavy rainfall over a short time period with current model output showing the likelihood of exceeding 20mm accumulations over a 6 hour period overnight.
Fig 3: Model output cloud and rainfall.
Status yellow rainfall warnings are in effect for a number of counties. Potential impacts from this heavy rainfall include:
Localised flooding
Difficult travelling conditions
Storm Lilian is the first “L” named storm since storm naming commenced in 2015.
Why was the name “Lilian” chosen?
Storm Lilian is named after Lilian Bland, who was an Anglo-Irish journalist and pioneer aviator. She was the first woman in Ireland to build and fly an aircraft, and quite possibly the world’s first woman to build her own airplane, the Bland Mayfly.
A low-pressure system will steer weather fronts over the country on Sunday and Monday.
This system will bring warm and very moist air, and this has the potential to produce heavy and intense spells of rain, which will fall in a relatively short time.
Expected impacts from the heavy rain will be surface and river flooding as well as disruption to travel.
There are yellow rainfall warnings in place on Sunday for Clare, Donegal and Connacht.
The warnings start at midday and run through to midday on Bank Holiday Monday.
The rain has the potential to cause flooding, damage to temporary structures as well as cause difficult driving conditions.
Early tonight, even heavier rain will move in over the country. Orange rainfall warnings have been issued for Galway, Mayo and Donegal.
The warnings will start at midnight on Sunday and will end at 10:00 on Bank Holiday Monday morning.
As this is a Bank Holiday weekend, there will be many people on holiday, and it is important that they take note of the rainfall warnings and take the appropriate steps to protect themselves.
As well as the unseasonably wet conditions there will be strong winds especially along coasts and over exposed ground so people should take care near the coasts.
The impacts from the rain will continue after the weather warnings cease as there is likely to be surface flooding, as well as runoff from fields and surfaced areas and smaller river catchments impacted by the heavy rain may get out of bank.
Updated on Saturday 03rd August 2024
After a rather pleasant end to July, a broad area of low pressure in the north Atlantic will introduce more unsettled conditions for the August bank holiday weekend. This low pressure will steer frontal systems across Ireland, with spells of heavy rain expected on Sunday and Bank Holiday Monday, coupled with fresh to strong and gusty southerly winds along Atlantic coasts.
Met Éireann forecaster Aoife Kealy said “It’ll feel fresher on Saturday but despite that, it will be the best day of the weekend. Though the temperatures will drop back to the mid to high teens, there’ll be plenty of dry spells and some sunshine between the scattered showers.”
The drier and brighter weather will be short-lived, as the next low pressure system in the north Atlantic drives weather fronts across Ireland on Sunday and Monday.
Aoife explained “This low pressure system will drag a warm, moist airmass with it from the mid-Atlantic. That warm, moisture-laden air will act like fuel for this system, meaning the rain that it brings will be heavy.”
Through Sunday afternoon and much of Monday, that heavy rain will move eastwards across the country. The rain will be heaviest in the west and southwest with flooding possible. Becoming blustery also, with fresh and gusty southerly winds developing, strong on western and southern coasts.
It will also be very mild on Sunday night due to the warm airmass that the low pressure system will introduce. Temperatures will not fall below 14 to 17 degrees, so it will be an uncomfortable night for sleeping.
Aoife continued “With the bank holiday weekend, more people will be out and about and they may not expect the unseasonably wet weather and strong winds. Sunday will not start off too bad but don’t let that lull you into a false sense of security. The rain will get progressively heavier through the afternoon and evening with those southerly winds picking up, so make sure to check the forecast and any warnings for your area before heading out.”
Yellow warnings have been issued for heavy rainfall for counties Clare, Galway, Mayo, Sligo, Leitrim and Donegal from Sunday afternoon through to Monday afternoon.
Potential impacts:
Localised flooding
Damage to temporary structures
Difficult travel conditions
Poor visibility
Stay in contact with the forecast over the coming days for the most up to date information on met.ie and on the Met Éireann app, particularly if planning outdoor activities.
Looking ahead to next week, current indications suggest that while it will be largely unsettled with showers and rain at times, no further impactful weather is expected.
Met Éireann have named Storm Kathleen (the 11th storm of the 2023/2024 season).
Below valid at 10am on Friday 5th April 2024.
Storm Kathleen is a significant low-pressure system tracking off the west coast which will bring strong southerly winds and damaging gusts across the country on Saturday.
Met Éireann have issued a nationwide yellow wind warning for Saturday with orange level wind warnings coming into effect for counties Cork, Kerry and Waterford at 7am, valid until 2pm, and counties Galway and Mayo at 9am, valid until 6pm. Storm Kathleen is a dynamic system so there may be updates to the warnings. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecasts.
Deputy Head of Forecasting, Liz Coleman said“It is the end of the Easter holidays so there will be a lot of people travelling and they may not be expecting such unseasonably strong and gusty winds. Please make sure to plan your journeys in advance by keeping in contact with the forecast. We are likely to see some trees down due to the saturated soils and strong winds. There will be dangerous conditions at sea too, coupled with wave overtopping and coastal flooding in some areas.”
The rapid deepening of Storm Kathleen is due the interaction of this low-pressure system with a strong southerly jet stream.
The potential impacts of Storm Kathleen are likely to be:
Very difficult travel conditions
Fallen trees
Some power outages
Coastal flooding
Wave overtopping
Harmonie model – wind/gust
Storm Kathleen will increase water levels on all coasts as we approach a period of spring tides. This will result in strong coastal winds, a rough sea state and significant waves. Coastal flooding and wave overtopping is likely, especially at times of high tide.
The rain associated with Storm Kathleen will fall on already saturated ground, therefore water will make its way quickly into the rivers. Cumulative rainfall totals could lead to elevated river levels in western and southwestern areas.
It will feel quite mild too for this time of year, as the southerly airflow bring warm air over the country.
Do we frequently get storms in April?
Two storms have been named in April since storm naming began in 2015/2016. Storm Hannah was named by Met Éireann on Fri 26th April 2019, which brought storm force winds to Mace Head. Storm Noa named by Météo France, brought storm force winds to Sherkin island on Wed 12th April 2023.
There was also a storm as late as 14th June 2018, Storm Hector, which brought storm force winds to Mace Head.
Why was the name “Kathleen” chosen?
Storm Kathleen is named after Kathleen “Kay” Antonelli/McNulty and Kathleen Lonsdale. This is one of the 7 names Met Éireann chose for the 2023-24 list. Met Éireann chose names of eminent Irish/Northern-Irish scientists to honour their important contributions to science and benefits for humankind.
Kathleen ‘Kay’ McNulty Mauchly Antonelli: one of the mothers of computer programming.
Kay was an Irish computer programmer, and one of the six original programmers on the ENIAC machine, which was one of the first general purpose electronic digital computers.
In 2017, DCU honoured Kay by naming their computer science building in her name.
The Irish-Centre for High-End Computing (ICHEC) also honoured her in 2019 when they named their new supercomputer “Kay” following a public vote whereby Kathleen beat out other candidates including Francis Beaufort and Nicholas Callan.
Kathleen Lonsdale: Irish crystallographer who demonstrated the crystal structure of benzene.
She was the first to use Fourier spectral methods while solving the structure of hexachlorobenzene in 1931.
She was also one of the first two women inducted as a Fellow of the Royal Society in 1945 alongside Marjory Stephenson, a British biochemist.
Ireland will experience a respite from the recent wet and windy weather as high pressure builds from the Azores over the weekend and becomes established over Ireland into next week, bringing cold, clear and generally calm conditions with little precipitation.
Figure 1: High Pressure building over Ireland. Colour scale represents airmass temperatures.
Met Éireann meteorologist Liz Coleman explained “It’s going to feel much colder than it has recently, with daytime temperatures in the low single figures and nighttime temperatures falling below zero in most areas. Widespread frost is expected with some ice, although generally dry conditions will limit ice formation to mainly areas of standing water or run off. Nevertheless, do take care while out and about.
While it will be cold, it will be mainly dry with sunny spells as the high pressure will prevent any significant rainfall.
Liz said “There will be showers at times in the north and west over the weekend and in the east through next week but rainfall amounts will be low. So a lot of dry weather in the forecast”.
Figure 2: Rainfall and pressure forecast
Liz continued “The cold temperatures coupled with near calm conditions means fog will also be a feature of our weather, particularly over the weekend. Dense fog patches are likely on Saturday and Sunday night. With little wind to clear the fog, it may linger into the daytime in some areas leading to tricky travelling conditions. Our forecasters will be monitoring the situation and will issue warnings as required.
Make sure to check in on the forecast and warnings for your areas on met.ie
Current indications suggest that high pressure will be in control of our weather until next weekend when the models show a breakdown to more unsettled, but still cold weather. Although there is a lot of uncertainty that far ahead in the forecast.
The latest weather advisories and warnings for Ireland are on the Met Éireann Warnings page. These services and more are available on our free app – available from the App store for iPhone, and Play store for Android. Visit our Weather Warnings page.
For advice and information on staying save in severe weather, please consult www.winterready.ie
A slow moving low pressure system will dominate Ireland’s weather over the weekend, bringing strong and gusty winds through Saturday and into Sunday, which will be accompanied by heavy rain and thundery showers.
Figure 1: Low pressure tracking across the country this weekend
Met Éireann meteorologist Liz Coleman said “There is a lot of weather coming our way over the weekend. South-easterly winds will veer westerly and intensify on Friday night as a band of rain crosses the country. The rain will be heavy at times with localised flooding possible, leading to difficult travelling conditions. Gales along coasts coupled with spring tides may lead to wave overtopping on exposed coasts”.
Figure 2: Wind Forecast
Met Éireann have issued wind and rain warnings. Details can be found on the Weather Warnings page.
There will be some respite from the rain through the afternoon on Saturday as it clears into the Irish sea by the afternoon. However southwest to west winds will continue strong and gusty steering some heavy and possibly thundery showers over mainly the western of the country through Saturday.
Liz continued “By Sunday morning (New Years Eve) the winds will have veered northwesterly with counties Clare, Cork and Kerry experiencing the most intense winds with the ongoing potential for wave overtopping in coastal areas. A mix of sunny spells and scattered showers are expected countrywide for the rest of the day.
Figure 3: Rainfall and Cloud forecast
The showers and winds will ease somewhat for midnight New Years celebrations with a sunny start in many areas on New Years Day and isolated showers. Cloud will thicken from the southwest through the afternoon with a further spell of rain late on Monday.
Make sure to check in on the forecast and warnings for your areas when making plans for the weekend on met.ie
The latest weather advisories and warnings for Ireland are on the Met Éireann Warnings page. These services and more are available on our free app – available from the App store for iPhone, and Play store for Android. Visit our Weather Warnings page.
For advice and information on staying save in severe weather, please consult www.winterready.ie
Tá scairdsruth gníomhach an deireadh seachtaine seo ag forbairt agus ag doimhniú na gcóras ísealbhrú amuigh san Atlantach agus aimsir stoirmeach á seoladh ar fud na hÉireann dá bharr.
Tá dhá stoirm ainmnithe ag Met Éireann, an 5ú agus an 6ú stoirm den séasúr reatha ainmnithe stoirme, Stoirm Elin & Stoirm Fergus. Ainmníodh Stoirm Elin thar oíche, agus tá sí ag dul i bhfeidhm ar Éirinn inniu, le rabhaidh ghaoithe oráiste do Dhún na nGall, Baile Átha Cliath & Cill Mhantáin ar feadh tamaill. Ainmníodh Stoirm Fergus ar maidin, agus beidh tionchar aici ar Éirinn níos deireanaí amárach agus go luath san oíche amárach (Dé Domhnaigh an 10 Nollaig), le rabhaidh ghaoithe oráiste don Chlár, do Ghaillimh & do Mhaigh Eo. Tá rabhaidh ghaoithe bhuí eisithe don dá theagmhas le haghaidh go leor contaetha chomh maith le rabhadh báistí buí do Dhún na nGall inniu. Le haghaidh tuilleadh sonraí ar rabhaidh, seiceáil met.ie/warnings.
Stoirm Elin, Dé Sathairn an 9 Nollaig
Ag féachaint ar dtús ar Stoirm Elin. Oíche Dé hAoine, d’fhorbair Stoirm Elin tríd an teagmháil a rinne bealach amach ar chlé le scairdstríoc le log fadaithe dromchla amach ó iarthar na hÉireann. Ansin ghluais Elin soir go tapa thar thuaisceart na tíre ar maidin, rud a ghin gaotha aniar go aniar aduaidh láidre go fórsa gála thar tír. Leanfaidh an lárphointe stoirme ag bogadh soir thar Albain tráthnóna, ach le gaotha aniar go aniar aduaidh láidre go fórsa gála agus scuabacha ina dhiaidh. Maolóidh na gaotha sin go luath anocht de réir a chéile.
Tá cairt anailíse ina léirítear forbairt Stoirm Elin thíos:
Cairt ina léirítear an scairdsruth agus an patrún brú thíos: D’fhorbair Stoirm Elin sa cheantar a aibhsíodh thuas áit a dteagmhaíonn log fadaithe le bealach amach ar chlé le scairdstríoc.
Taispeántar éabhlóid Harmonie de Stoirm Elin thíos:
Stoirm Fergus, Dé Domhnaigh an 10 Nollaig
Leanfaidh tonnlogán atá ag doimhniú go tapa, atá á chruthú i lár an Atlantaigh faoi láthair agus é ag teagmháil le bealach amach ar chlé le scairdstríoc, ag tiontú go Stoirm Fergus agus í ag druidim ón iardheisceart tríd an lá inniu, anocht agus amárach. Bhí brú 996hpa aige ar dtús, agus meastar go ndoimhneoidh sé go dtí thart ar 968hpa amach san Atlantach go luath anocht, agus mar sin go gcomhlíonfaidh sé leis na critéir maidir le cioclónghineas tapa. Líonfaidh sé beagáinín ansin agus é ag dul i dtreo na hÉireann, agus meastar go dtiocfaidh sé i dtír tráthnóna amárach ar chósta an iarthair agus brú lárnach de thart ar 980hpa aige. Dúirt Meitéareolaí Met Éireann, Michelle Dillon: “Beidh gaotha láidre go fórsa gála aniar aneas ag athrú aniar ag forbairt tráthnóna Dé Domhnaigh, tráthnóna agus luathoíche Dé Domhnaigh agus Stoirm Fergus ag dul soir ar fud na tíre, ag líonadh beagáinín mar a théann sí. Beidh farraigí arda mar thoradh ar bhorradh stoirme agus chomh maith leis na dálaí stoirmeacha, tá baol ann go mbeidh tuilte cósta ar feadh codanna den chósta thiar, go háirithe ag lán mara.”
Cairt anailíse ag 12Z an 9 Nollaig, ina léirítear forbairt Stoirm Fergus agus í fós go maith amach san Atlantach.
Cairt ina léirítear an scairdsruth agus an patrún brú thíos: Tá Stoirm Fergus ag forbairt ó thonnlogán áit a bhfuil sí ag teagmháil le bealach amach ar chlé le scairdstríoc.
Tá éabhlóid Harmonie Stoirm Fergus le feiceáil thíos:
Farraigí arda nó an-ard amach ó chósta an iarthair amárach:
Tá níos mó cinnteachta ann go mairfidh an tréimhse fhuar reatha go dtí oíche Dé Máirt. Tá rabhadh teochta ísle/oighir buí i bhfeidhm ar fud na tíre ó thráthnóna Dé hAoine go dtí tráthnóna Dé Domhnaigh de réir mar a fhorbraíonn réimsí forleathana seaca agus oighreata. Tá rabhadh ceo buí i bhfeidhm ar fud na tíre don tréimhse chéanna de réir mar a thagann ceo tiubh agus roinnt paistí ceo seaca, rud a chuirfidh leis na dálaí guaiseacha atá ann cheana féin. Déanfar monatóireacht agus athbhreithniú/leathnú ar na rabhaidh más gá, mar sin coinnigh suas leis an réamhaisnéis.
Mhínigh an meitéareolaí Aoife Kealy an scéal; “Beidh ceathanna scaipthe ann don Aoine agus don deireadh seachtaine. Titfidh an chuid is mó díobh sin mar bháisteach ach beidh roinnt clocha sneachta, flichshneachta agus sneachta ann uaireanta. Ansin, oíche Dé Domhnaigh beidh córas ísealbhrú ag dul thar an gcósta theas. D’fhéadfadh sé sin roinnt báistí agus ceobhráin a chruthú i gcontaetha an chósta thoir agus theas, agus d’fhéadfadh roinnt flichshneachta a bheith ann freisin. Níl an chuma ar an gcóras sin go mbogfaidh sé suas ar fud na tíre, agus fágfaidh sé sin go leanfar leis na dálaí fuara.”
Is minic a bheidh teochtaí i rith an lae sna laethanta amach romhainn idir 1 agus 5 chéim, agus is minic a thitfidh teochtaí oíche go 0 go -4 céim nó faoina bhun. Mar thoradh air sin, beidh réimsí seaca agus oighir forleathana ann, in éineacht le limistéir ceo tiubh agus ceo seaca.
Dúirt Aoife freisin, “Toisc go mbeidh sé chomh fuar sin, beidh an sioc agus an t-oighear ag fanacht in áiteanna i rith an lae. Tógfaidh sé tamall ar na limistéir cheo agus ceo seaca glanadh ó áiteanna i rith an lae freisin. Tiocfaidh sé sin go léir le chéile chun dálaí contúirteacha taistil, drochléargas agus dálaí sleamhna a chruthú faoi chois.”
Beidh an Luan agus an Mháirt fuar ach tirim do go leor daoine. Mar sin féin, beidh cúpla cith ann uaireanta san oirthear agus san oirdheisceart agus arís eile, d’fhéadfaidís sin tiontú ina gclocha sneachta agus flichshneachta, agus seans sneachta ar thalamh ard ann.
Lean Aoife ar aghaidh, “I láthair na huaire, tá an chuma ar an scéal go bhfanfaidh an tréimhse fhuar seo linn Dé Luain ar fad agus Dé Máirt don chuid is mó. Ina dhiaidh sin, de réir na gcomharthaí reatha, scaipfidh córas ísealbhrú ón Atlantach níos déanaí Dé Máirt agus Dé Céadaoin, rud a fhágann go mbeidh báisteach fhorleathan agus dálaí níos séimhe ann. Mar sin féin, tá seans ann, de réir mar a dhéanann an bháisteach sin teagmháil leis an aer fuar os ár gcionn, go bhféadfadh cuid de titim mar fhlichshneachta nó sneachta. Ach beidh sé sin gearrshaolach, mar tiocfaidh an t-aer níos séimhe isteach go tapa.”
Don réamhaisnéis is cruinne agus is cothroime le dáta do do cheantar, tabhair cuairt ar www.met.ie.
Chun comhairle a fháil maidir le hullmhú d’aimsir gheimhridh, tabhair cuairt ar www.winterready.ie.
Tosóidh an geimhreadh meitéareolaíoch Dé hAoine 1 Nollaig. Agus an dáta sin ag druidim linn, bunófar aershreabh ó thuaidh ar fud na hÉireann, a mbeidh dálaí i bhfad níos fuaire mar thoradh air, agus sioc forleathan ann agus roinnt oighir ag forbairt gach oíche. Beidh ceathanna ó am go chéile tríd an tseachtain freisin, a d’fhéadfadh a bheith geimhriúil, ach beidh na ceathanna sin éadrom go leor agus carnadh báistí fíorbheag ann.
Cé chomh fuar is a bheidh sé?
Mhínigh meitéareolaí Met Éireann Aoife Kealy, “Beidh aermhais Artach ag sleamhnú síos tharainn an tseachtain seo, rud a fhágann go mbeidh dálaí i bhfad níos fuaire ann ná mar a bhí againn le déanaí. Is ar éigean go n-éireoidh teochtaí i rith an lae os cionn 5 chéim, go háirithe ón gCéadaoin ar aghaidh. Beidh teochtaí oíche gar don reophointe, nó faoi, i rith na seachtaine freisin i gcaoi is go mbeidh sioc forleathan agus roinnt oighir ann. Anuas air sin, fágfaidh gaotha éadroma go dtiocfaidh ceo thar oíche, agus é ag éirí tiubh in áiteanna. Is go mall a ghlanfaidh aon sioc, oighear agus ceo ar maidin, agus beidh sé deacair taisteal in amanna. Mar sin, beidh gá le cúram breise ar na bóithre.”
An mbeidh sé fliuch nó tirim?
Cé go mbeidh sé fuar, beidh an tseachtain tirim den chuid is mó le roinnt tréimhsí géine. Is minic a bheidh brú ard gar d’Éirinn tríd an tréimhse, rud a fhágann go mbeidh dálaí socra go ginearálta, agus go gcuirfear cosc ar aon bháisteach shuntasach.
Lean Aoife ar aghaidh “D’fhéadfadh paistí báistí a bheith ann ó dheas oíche Dé Céadaoin, agus beidh cúpla cith ann uaireanta, go háirithe sa tuaisceart agus san oirthear, ach beidh na ceathanna sin éadrom. Mar sin, tríd is tríd beidh neart aimsire tirime ann.”
Agus an mbeidh sneachta ann?
Dúirt Aoife, “Mar gheall ar na dálaí fuara Déardaoin agus Dé hAoine, is féidir go luífeadh roinnt ceathanna chun cloch sneachta nó flichshneachta, agus seans go mbeidh sneachta éigin ann, go háirithe thar thalamh níos airde. Ach fiú nuair a éireoidh na ceathanna geimhriúil, beidh carnadh an-bheag ann.” Cá fhad a mhairfidh an tréimhse fhuar?
Méadaíonn an éiginnteacht ón deireadh seachtaine ar aghaidh. Tugann na comharthaí reatha le fios go bhfanfaidh na dálaí níos fuaire ná an meán agus ceathanna breise ann, ag éirí geimhriúil in amanna. Mar sin féin, d’fhéadfadh roinnt tréimhsí báistí níos faide a bheith ann má thrasnaíonn aer níos séimhe sinn ón deisceart.
Don réamhaisnéis is cruinne agus is cothroime le dáta do do cheantar, tabhair cuairt ar www.met.ie.
Chun comhairle a fháil maidir le hullmhú d’aimsir gheimhridh, tabhair cuairt ar www.winterready.ie.
D’ainmnigh Oifig Meitéareolaíochta an RA Stoirm Chiaráin Dé Domhnaigh an 29 Deireadh Fómhair. Tá an stoirm le dul gar do chósta theas na hÉireann oíche Dé Céadaoin, an 1 Samhain. Leanfar le ceathanna agus tréimhsí níos faide báistí tríd an deireadh seachtaine Saoire Bainc agus isteach sa tseachtain seo chugainn roimh Stoirm Chiaráin.
Tá comhairle aimsire eisithe do na laethanta amach romhainn mar go bhfuil tionchar ag an aimsir luaineach ar fud na tíre i gcónaí.
Comhairle d’Éirinn
Dé Luain, Dé Máirt agus Dé Céadaoin, beidh ceathanna troma nó tréimhsí báistí níos faide ag amanna ar fud na hÉireann agus is dócha go mbeidh tuilte in áiteanna, mar go bhfuil ithreacha ar maos in uisce agus go bhfuil leibhéil na n-aibhneacha ard.
Níos déanaí Dé Céadaoin agus Déardaoin, tabharfaidh Stoirm Chiaráin báisteach throm agus gaotha láidre léi. Tugann na comharthaí reatha le fios go mbeidh an bháisteach is troime agus na gaotha is láidre i gCúige Mumhan agus i gCúige Laighean agus gur dócha go mbeidh tuilte ann.
Bailí: 14:40 Dé Domhnaigh 29/10/2023 go 23:30 Déardaoin 02/11/2023
Eisithe: 14:41 Dé Domhnaigh 29/10/2023
Beidh brú íseal fós i réim ar aimsir na hÉireann don tseachtain amach romhainn, rud a fhágfaidh go mbeidh tuilleadh ceathanna troma agus báistí ann. Agus méideanna suntasacha báistí ann le roinnt seachtainí anuas, tá coinníollacha na talún ar fud na tíre ar maos in uisce nó báite, agus tá go leor aibhneacha ard. Mar thoradh air sin, tá an baol tuilte sna laethanta amach romhainn méadaithe.
Dúirt meitéareolaí Met Éireann Aoife Kealy “Fiú inniu (Dé Domhnaigh), fágfaidh ceathanna troma go mbeidh baol tuilte áitiúla ann, go háirithe do cheantair an iarthair agus do lár na tíre thuaidh. Mar sin, tá rabhadh báistí buí i bhfeidhm don Chabhán, do Mhuineachán, do Chonnachta, don Longfort, do Lú agus don Iarmhí go dtí 9pm Dé Domhnaigh.”
Tabhair cuairt ar ár leathanach Rabhadh Aimsire.
Is beag faoiseamh a bheidh ann ón mbáisteach roimh Stoirm Chiaráin, mar go leanfar le ceathanna agus tréimhsí báistí Dé Luain agus Dé Máirt.
Lean Aoife ar aghaidh “Cuirfidh ceathanna troma eile Dé Luain le carnadh báistí atá ard cheana féin. Ansin, beidh báisteach níos forleithne a d’fhéadfadh a bheith trom Dé Máirt ina cúis le meath breise ar dhálaí talún agus ar leibhéil abhann. Mar sin, beidh baol leanúnach tuilte áitiúla ann agus muid ag bogadh isteach sa tseachtain seo chugainn.”
Is dócha go gcuirfidh an aimsir fhliuch sin i dtús na seachtaine seo chugainn le tionchar Stoirm Chiaráin tráthnóna Dé Céadaoin agus Déardaoin. Tugann na comharthaí reatha le fios go ngluaisfidh an stoirm thar ár gcósta theas tráthnóna agus oíche Dé Céadaoin sula mbogfaidh sí soir ó thuaidh trí Mhuir Éireann agus thar an Ríocht Aontaithe (féach Léaráid 2 thíos). De réir mar a théann sí tharainn, tabharfaidh sí aimsir an-fhliuch agus ghaofar léi, le báisteach throm in áiteanna. Agus dálaí fliucha ann cheana féin roimh Stoirm Chiaráin, beidh baol tuilte níos airde ann, agus d’fhéadfadh gaotha láidre cur isteach ar chúrsaí freisin.
Figiúr 2: Gluaiseacht thuartha reatha Stoirm Chiaráin oíche Dé Céadaoin
Faoi láthair, tá éiginnteacht áirithe fós ann maidir leis an treo a rachaidh Stoirm Chiaráin, ach is dóichí ná a mhalairt go ngluaisfidh sí thar chósta theas na hÉireann. Is féidir nuashonruithe ar an réamhaisnéis agus rabhaidh amach anseo sna laethanta romhainn a fháil ag https://www.met.ie/warnings
Chun comhairle agus faisnéis a fháil maidir le fanacht sábháilte in aimsir throm, féach www.winterready.ie
Tá limistéar coimpléascach ísealbhrú a bhfuil roinnt frontaí leabaithe ann, ar a dtugtar Stoirm Babet, ag bogadh suas thar an Ríocht Aontaithe inniu, Dé Céadaoin an 18ú lá, agus a fhrontaí aimsire ag tabhairt bandaí báistí troime ar fud na hÉireann
Ón íomhá shatailíte thuas is féidir linn bandaí móra scamall a fheiceáil ag síneadh ón bpríomh-lárphointe ísealbhrú díreach os cionn thuaisceart na Fraince. Thug na bandaí scamall sin go leor báistí ar fud chontaetha an deiscirt Dé Máirt agus inniu (Dé Céadaoin).
Bhí rabhaidh bháistí oráiste ag Met Éireann do Chorcaigh, do Chiarraí agus do Phort Láirge, agus tuairiscíodh carnadh suntasach báistí sna contaetha sin ó mhaidin Dé Céadaoin.
Dúirt meitéareolaí Met Éireann Mark Bowe “fuair ceantair chósta i gCorcaigh an chuid is measa den bháisteach, agus bhí tuairiscí ann faoi thuilte agus bóithre á ndúnadh.”
Lean Bowe ar aghaidh, “tá an bháisteach throm fós ag bogadh ó thuaidh, agus mar sin tá síneadh curtha againn lenár rabhadh oráiste i bPort Láirge go dtí níos déanaí tráthnóna inniu, agus chuir muid Loch Garman agus Cill Mhantáin leis na rabhaidh oráiste freisin.”
Tá báisteach throm leanúnach le bogadh thar na contaetha sin ó dheas inniu, agus is dócha go mbeidh tuilte ann is go gcuirfear isteach go mór ar chúrsaí taistil.
De réir mar a leanann na frontaí a bhaineann le Babet ag bogadh ó thuaidh ar fud na tíre, is féidir linn a bheith ag súil le báisteach throm ag amanna i ngach contae agus, leis sin, tá rabhaidh bháistí ar leibhéal buí curtha i bhfeidhm ar fud na tíre ag Met Éireann.
Leanfaidh na rabhaidh sin ar aghaidh go dtí níos déanaí tráthnóna nuair a bhogfaidh an bháisteach throm dheireanach amach ó thuaisceart na tíre anocht
Léaráid 2: Réamhaisnéis Bháistí HARMONIE
Ag féachaint chun cinn go dtí deireadh na seachtaine, luaigh Bowe, “fanfaidh an aimsir fhliuch agus luaineach linn tar éis do Babet a bheith imithe, is baolach. Fanfaidh an brú íseal i réim, agus beidh múraíl nó tréimhsí báistí ar fud na tíre díreach amach go dtí an deireadh seachtaine, agus an baol ann go bhféadfadh tuilleadh rabhadh báistí buí a bheith ann.”
Tá réamhaisnéiseoirí ag déanamh monatóireachta ar éabhlóid Stoirm Babet agus ar a héifeachtaí de réir mar a théann sí thar an tír, mar sin bí cinnte bheith sábháilte agus fanacht cothrom le dáta leis na rabhaidh is déanaí ar www.met.ie/warnings
Léaráid 3: Réamhaisnéis Mheánbhrú na Farraige & Bháistí ECMWF (Lárionad Eorpach do Réamhaisnéisí Aimsire Meánraoin)
Táimid ag coinneáil súil ghéar ar fhorbairt na n-imeachtaí sin. Fan sábháilte, agus coinnigh suas chun dáta leis na nuashonruithe breise agus na rabhaidh is déanaí ar https://www.met.ie/warnings.
Tá Stoirm Agnes ainmnithe ag Oifig Met na RA maidin Dé Luain 25ú de Meán Fómhair. Tá an t-imeacht suntasach aimsire seo le cur ar an talamh titim os cionn na hÉireann Dé Céadaoin 27ú de Meán Fómhair. Sular tháinig sé, tá roinnt rabhadh gaoithe agus báistí eisithe ag Met Éireann ar fud na gcontaetha i gCúige Laighean agus i gCúige Mumhan. Tá rabhaidh eisithe ag Oifig Meitéareolaíochta na Ríochta Aontaithe do Chúige Uladh freisin.
Tá an stoirm forbartha seo amuigh i lár an Atlantaigh faoi láthair. Léiríonn ár gcairt anailíse is déanaí an córas aimsire ina chéim tosaigh.
Taispeánann an íomhá satailíte infridhearg ó 12Z Dé Luain an 25ú Meán Fómhair an mais mór scamall a fhorbróidh ina Stoirm Agnes ar deireadh thiar.
Thar na huaireanta agus na laethanta amach romhainn beidh an réimse seo de bhrú íseal ag forbairt suas ag an scairdsruth agus dul faoi doimhniú tapa.
Léirítear thíos an tuar scairdsrutha ó mhúnla an Ionaid Eorpaigh um Réamhaisnéisí Aimsire Meánraoin (ECMWF). Béim i ngorm tá Stoirm Agnes a múnlaíodh ag 12Z inniu an 25ú Meán Fómhair.
Storm Agnes development on Monday September 25th
Ag bogadh ar aghaidh 24 uair eile go dtí 12Z Dé Máirt an 26ú Meán Fómhair is féidir linn a fheiceáil go bhfuil an t-íseal tar éis bogadh trasna an Atlantaigh, á thógáil suas ag an scairdsruth. Tá sé méadaithe go suntasach freisin.
Ag breathnú ar aghaidh go dtí 06Z ar an gCéadaoin an 27ú Meán Fómhair, an lá a dtiocfaidh an stoirm i dtír, is féidir linn a fheiceáil conas a d’aistrigh an brú íseal go dtí an taobh thuaidh den scairdshruth agus go ndearnadh é a dhoimhniú tuilleadh.
Stoirm Agnes
Is dócha go dtiocfaidh Stoirm Agnes i dtír go déanach maidin Dé Céadaoin agus faoi láthair tá roinnt rabhaidh aimsire eisithe mar fhreagra. Is dócha go ndéanfar na rabhaidh seo a nuashonrú de réir mar a bheidh tuilleadh sonraí samhaltaithe ar fáil.
Faoi láthair, meastar go mbeidh tionchar ag na gaotha is láidre ar dheisceart agus oirdheisceart na tíre. Mar sin féin, léiríonn an treoir is déanaí ónár gcóras ardtaifigh tuar ensemble, IREPS, an neamhchinnteacht atá ann faoi láthair maidir le rian cruinn Stoirm Agnes.
Léiríonn gach ponc san íomhá thuas cá bhfuil réamhaisnéis aonair ó IREPS tar éis lár an chioclón a thuar thar Éirinn.
Agus muid ag druidim níos gaire don imeacht, beidh IREPS in ann níos mó cinnteachta a thabhairt maidir le rian cruinn Stoirm Agnes.
Táimid ag déanamh monatóireacht ghéar ar fhorbairt na stoirme seo agus eiseofar nuashonruithe breise ar ár rabhaidh. Coinnigh suas chun dáta leis na rabhaidh is déanaí ar https://www.met.ie/warnings.
Tar éis Iúil agus Lúnasa an-fhliuch agus an-chorraithe, tá coinníollacha míne agus socraithe den chuid is mó tagtha ar ais don chéad seachtain de Mheán Fómhair.
Tá na coinníollacha te seo mar gheall ar limistéar ísealbhrú siar ón Ibéir atá, mar aon le brú ard thar Chríoch Lochlann, ag cur aer te agus tais ar fud na hÉireann.
Fig 1: Teocht Mais Aeir ECMWF don chuid eile den tseachtain (Teocht Féideartha Bolgáin Fhliucha 850mb)
Míníonn Meitéareolaí le Met Éireann Emer Flood, “Tá an chuma ar an scéal go mbeidh brú ard chun tosaigh ar ár n-aimsir don chuid eile den tseachtain, rud a fhágann go bhfuil coinníollacha míne agus socraithe go ginearálta. Sroichfidh teochtaí i rith an lae go luath sna 20idí i gcuid mhór den tír, agus sroichfidh codanna de lár na tíre theas 25°C nó os a chionn. Beidh na teochtaí te seo i rith an lae in éineacht le teochtaí oíche nach dtitfidh aon níos ísle ná na déagóirí luatha as a dtiocfaidh roinnt coinníollacha codlata míchompordacha sna laethanta amach romhainn.
Fíor 2: Teocht Uasmhéid agus Íosta Harmonie don Chéadaoin (6ú de Meán Fómhair)
Aréir taifeadadh íosteocht 20.7°C i nDairbhre, arb í an chéad oíche trópaiceach den bhliain a taifeadadh go sealadach.
Deir Sandra Spillane, clíeolaí le Met Éireann, “Thaifeadamar teochtaí os cionn 25.0°C ag roinnt dár stáisiúin inné (Dé Luain an 5ú de Meán Fómhair) agus mar sin beimid ag coinneáil súil ghéar ar na teochtaí sna laethanta amach romhainn féachaint an mbaintear amach critéir na dtonn teasa”.
Tarlaíonn tonn teasa ag stáisiún Met Éireann nuair a bhíonn an t-uasteocht aeir scáthaithe laethúil níos airde ná cúig ghrád is fiche Celsius (> 25.0°C) ar feadh cúig lá nó níos mó as a chéile. Tá tuilleadh eolais ar dhálaí teo le fáil inár nIonad Samhraidh.
Mar sin an bhfanfaidh an aimsir bhreá linn don deireadh seachtaine?
Leanann Emer uirthi, “Cé go bhfeicfidh go leor ceantar aimsir bhreá agus thirim an deireadh seachtaine, beidh báistí ann uaireanta, san iarthar Dé Céadaoin, ach níos faide soir i dtreo dheireadh na seachtaine le seans ann go mbeidh stoirmeacha ann.”
“Tá meath ag teacht ar aimsir níos fuaire agus níos corraithí sna samhlacha go luath an tseachtain seo chugainn cé go bhfuil go leor éiginnteachta fós ag an bpointe seo”.
Chun an réamhaisnéis is cruinne agus is déanaí do do cheantar ar Oileán na hÉireann a fháil téigh chuig met.ie. Tá na comhairleacha aimsire agus na rabhaidh is déanaí d’Éirinn ar fáil ar leathanach Rabhaidh Met Éireann. Tá na seirbhísí seo agus níos mó ar fáil ar ár n-aip saor in aisce – ar fáil ón App Store don iPhone, agus ón Play Store do Android.
Le comhairle a fháil ar conas fanacht sábháilte in aimsir fhíneáil, seiceáil Bí Réidh don Samhradh.
Tráchtaireacht an Réamhaisnéiseora
Storm Bert named by Met Éireann (22nd – 24th November 2024)
Issued on Thursday 21st November 2024, valid until further notice
OVERVIEW
METEREOLOGICAL SITUATION
This weekend, Storm Bert will move close to Ireland, displacing the recent cold Artic airmass. Very strong winds and heavy rain will track north eastwards over the country on Friday night (yellow wind and rain warnings issued nationwide), which will continue right through the weekend.
Figure 1 – 6 hour rainfall forecast showing heavy rain sweeping across the country on Friday night (22nd November) into Saturday (23rd November), following by heavy scattered showers on Sunday (24th November) and Monday (25th November).
Meteorologist Andrew Doran-Sherlock says: “Storm Bert will bring milder but very wet and windy conditions for the weekend. Heavy rain on Saturday and Sunday will likely lead to localised flooding in urban areas and some river catchments particularly in the west and southwest, as this rain is falling on already saturated and waterlogged ground.
We are monitoring the situation closely and will upgrade/issue warnings as Met Éireann’s high resolution model (which provides information 2-days ahead) is analysed.
There’s strong likelihood of status orange wind warnings in western and northwestern counties. The impacts from Storm Bert will commence later on Friday and will continue through the weekend and potentially through early next week as well.”
Figure 2 – 3 hour mean winds and max gusts. The colours represent wind warning levels for gusts from Friday afternoon (22nd November) to Monday night (25th November).
HOW TO STAY SAFE IN EXTREME WEATHER
NOTE THAT:
The warnings are likely to be updated. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any warnings’ updates.
The timing and location of extreme weather occurrences can significantly affect their impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and level of impacts can be strongly affected by previous weather conditions. When issuing a warning, Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions that may increase the level of impact expected for particular areas.
WHY AND HOW ARE STORMS NAMED?
Storms are named when they could cause ‘medium’ or ‘high’ impacts in one of the three partner countries. This enables consistent, authoritative messaging to the public and other stakeholders to help them to prepare for and stay safe during potentially severe weather events.
Since 2015, Met Éireann and the UK Met Office have been working together on the naming programme and were joined by the Netherlands’ KNMI in 2019, to form the ‘western group’ of European weather services.
When a storm is forecast, the national weather service that expects the biggest impact from the severe weather to hit its region, or is likely to be first affected by it, names the storm. Storm naming happens in conjunction with orange/red weather warnings, which could be for wind, rain or snow, or a combination of these conditions. Those warnings are, in turn, issued based on a combination of numerical thresholds and the potential impacts foreseen.
HOW ARE STORM NAMES CHOSEN?
Met Éireann, the UK Met Office and KNMI publish a new list of storm names for each Storm Season, which commences on 1st September.
This 2024/25 season, each of the three meteorological services contributed seven names to the season’s list. Met Éireann’s contributions to this year’s list were taken from more than 500 suggestions by primary school children participating in ESB Science Blast last February.
The full 2024/25 list is Ashley, Bert, Conall, Darragh, Éowyn, Floris, Gerben, Hugo, Izzy, James, Kayleigh, Lewis, Mavis, Naoise, Otje, Poppy, Rafi, Sayuri, Tilly, Vivienne, Wren, with Met Éireann contributing the names for C, D, H, I, N, P and V (names chosen by Met Éireann in bold).
(Note – letters Q, U, X, Y, Z are not included, in line with the US National Hurricane Centre naming convention.)
PAST STORM SEASONS OVERVIEW
For more information on storm names and past storms, see Storm Centre and Major Weather Events
First cold snap of the season (Week commencing the 18th of November)
Updated on Wednesday 20th November 2024, valid until further notice
OVERVIEW
Fig 1 – Low pressure system approaching Ireland from the southwest this evening (Wednesday 20th). The interaction of this low with the cold air already over us will cause its heavy rain, transitioning to sleet and snow.
Fig 2 – Surface Air Temperatures and Freezing Level (the level in the atmosphere at which the temperature is zero) indicating that the cold temperatures will stay with us through the next couple of days.
HOW TO STAY SAFE DURING WINTRY WEATHER – BE WINTER READY
————————————
Monday 18th November 2024 updates:
OVERVIEW
Potential Impacts:
METEOROLOGICAL SITUATION
Turning cold across Ireland tonight as an Arctic airmass becomes established over the country which looks set to persist for several days.
Fig 1- Airmass temperatures showing cold Arctic air sinking over the country. ECMWF 00z Run Monday 18th of November.
Meteorologist Rebecca Cantwell says:
“This evening and tonight rain will meet colder air in Ulster and parts of north Connacht turning to sleet and snow in some areas. This will bring tricky travelling conditions as visibility is greatly reduced in wintery showers.
As the rain clears through tonight and tomorrow, the cold arctic air will move southwards over the country. So, a notably colder day tomorrow but brightening up too with some sunshine. It will continue cold right through the working week with daytime temperatures struggle to rise above 2 to 6 degrees and temperatures falling widely below freezing at night. We’ll see a widespread frost developing and icy stretched too, leading to slippery conditions under foot and possibly travel disruption in some areas.”
Rebecca continues:
“That northerly airflow will also bring scattered showers of rain, sleet and snow through the week and with those cold temperatures, that precipitation will tend to freeze, increasing icy conditions, so do take care when out and about”
Fig 2- Surface temperatures dropping by day and night next week. ECMWF 00z Run Monday 18th November.
Looking ahead towards the end of the week, there is a chance of some rain, sleet or snow moving into the south on Thursday with the possibility of some wet and windy weather on the weekend but a high degree of uncertainty at this time.
Stay up-to date with the forecast and any updates to the warnings on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
Be Winter Ready
Stay up-to date with the forecast and the warnings on met.ie, the Met Éireann app or Met Éireann socials (@meteireann).
“Be Winter Ready”: Follow recommendations before, during and after severe weather on gov.ie – Be Winter Ready (www.gov.ie)
Potentially impactful weather Friday 18th October and over the weekend (19th- 20th October) - Storm Ashley
Saturday 19th October 2024 updates:
The meteorological information provided below (see “Overview”) is still valid and Storm Ashley has been confirmed as a rapid deepening or explosive cyclogenesis system. It is worth emphasising the complex scenario Storm Ashley will bring to coastal areas of the country, especially as it coincides with to some of the highest tides of the year.
Storm Ashley will also bring spells of heavy rain on Sunday, which is likely to lead to localised flooding in urban areas and small river catchments, as this rain is falling on already saturated and waterlogged ground.
In view of all this, Met Éireann has updated the weather warnings in place for Sunday and added a new yellow rainfall warning (see latest warnings here). Therefore, it is important to re-emphasize the main impacts expected:
Please remember to “Stay Back, Stay High, Stay Dry” at all times during this event and have a look at the below section “How to Stay Safe in Extreme Weather” for detailed public authorities’ advice.
The following information is valid on Friday 18th October 2024 and until further update
OVERVIEW
Storm Ashley has been named by Met Éireann, becoming the first storm of the 2024/2025 season.
Storm Ashley is a low-pressure system currently developing in the western North Atlantic, on the southern side of the Jet Stream. It is expected to travel quickly eastwards over the Atlantic this weekend, crossing to the northern side of the Jet Stream, becoming positioned in the left exit region (a developmental area of the Jet) which will cause it to undergo rapid deepening later on Saturday.
Fig 1- ECMWF 00z Run Friday 18th Oct showing atmospheric pressure (black lines) overlayed with the Jet Stream (purple colour), showing how the jet stream will deepen Ashley over the weekend into a storm depression and steer it to the northwest of Ireland and the UK (see Sunday slide below)
The system will become a storm depression as it swings up to the west and northwest of Ireland on Saturday night and Sunday.
Fig 2 – ECMWF 00z Run Friday 18th Oct showing atmospheric pressure (black lines) overlaid with the Jet Stream (purple colour), showing Storm Ashley in on the northern part of the jet stream, impacting Ireland and the UK on Sunday.
Met Éireann’s meteorologist Liz Walsh, says:
“Storm Ashley will bring strong southerly winds overnight on Saturday night and early Sunday with a second wave of even stronger south-westerly winds, accompanied by damaging gusts across the country, from mid-morning on Sunday, right though the afternoon and into the evening in some parts.”
She continues:
“We are currently in a period of exceptionally high spring tides, and this, tied in with the strong winds and high waves, will substantially increase the risk of coastal flooding, especially along Atlantic coasts”.
At this time, Met Éireann has issued an Orange Wind Warning for some western counties and a Yellow Wind Warning for Ireland, for Sunday, but the warnings are likely to be updated as more information from our high-resolution models comes in and is analysed by our meteorologists (latest warnings here).
KEY INFORMATION – SUMMARY OF IMPACTS
The potential impacts of Storm Ashley are:
NOTE THAT:
The warnings are likely to be updated. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any warnings’ updates.
The timing and location of extreme weather occurrences can significantly affect their impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and level of impacts can be strongly affected by previous weather conditions. When issuing a warning, Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions that may increase the level of impact expected for particular areas.
HOW TO STAY SAFE IN EXTREME WEATHER
WHY AND HOW ARE STORMS NAMED?
Storms are named when they could cause ‘medium’ or ‘high’ impacts in one of the three partner countries. This enables consistent, authoritative messaging to the public and other stakeholders to help them to prepare for and stay safe during potentially severe weather events.
Since 2015, Met Éireann and the UK Met Office have been working together on the naming programme and were joined by the Netherlands’ KNMI in 2019, to form the ‘western group’ of European weather services.
When a storm is forecast, the national weather service that expects the biggest impact from the severe weather to hit its region, or is likely to be first affected by it, names the storm. Storm naming happens in conjunction with orange/red weather warnings, which could be for wind, rain or snow, or a combination of these conditions. Those warnings are, in turn, issued based on a combination of numerical thresholds and the potential impacts foreseen.
HOW ARE STORM NAMES CHOSEN?
Met Éireann, the UK Met Office and KNMI publish a new list of storm names for each Storm Season, which commences on 1st September.
This 2024/25 season, each of the three meteorological services contributed seven names to the season’s list. Met Éireann’s contributions to this year’s list were taken from more than 500 suggestions by primary school children participating in ESB Science Blast last February.
The full 2024/25 list is Ashley, Bert, Conall, Darragh, Éowyn, Floris, Gerben, Hugo, Izzy, James, Kayleigh, Lewis, Mavis, Naoise, Otje, Poppy, Rafi, Sayuri, Tilly, Vivienne, Wren, with Met Éireann contributing the names for C, D, H, I, N, P and V (names chosen by Met Éireann in bold).
(Note – letters Q, U, X, Y, Z are not included, in line with the US National Hurricane Centre naming convention.)
PAST STORM SEASONS OVERVIEW
For more information on storm names and past storms, see Storm Centre and Major Weather Events
The following information is valid on Thursday, 17th October 2024 and until further update.
Summary – A weather advisory has been issued for Ireland
This Friday, a brief period of heavy rain and strong winds across the country is expected.
We are monitoring another low-pressure system which could undergo rapid deepening on Saturday with the potential for strong winds and potentially a named storm; however, uncertainty still exists about this event.
Additionally, we are currently in one of the highest Spring tides of the year and this, tied in with any strong winds and high waves will increase the risk of coastal flooding.
Weather warnings for Saturday/Sunday, related to the Advisory issued for Ireland today, will be issued starting tomorrow, Friday 18th October, when Met Éireann’s high–resolution model provides an updated situation about the evolution of the low pressure system, and our meteorologists analyse it.
Meteorological situation
The Jet Stream is expected to become very active across the Atlantic later this week and into this weekend which allowing it to pick up low-pressure systems and deepen them as they cross the Atlantic. The first low pressure system of interest (Figure 1 forecast time 12Z on Friday) is currently off the coast of Newfoundland, (Canada) as of Wednesday 16th October, and this system will undergo a period of deepening as it tracks towards Iceland by Friday night. Even though the low itself won’t impact us directly, an associated active frontal system will move eastwards over Ireland on Friday. All areas are likely to see a brief period of heavy rain and strong winds during the day on Friday.
We are currently in one of the highest Spring tides of the year and unusually high tides mean coastal flooding is possible. These exceptionally high Spring tides are due to the current proximity of the moon to the earth leading to an increased gravitational pull. Given the high astronomical tides any strong winds and high waves will increase the risk of coastal flooding, especially along Atlantic coasts.
Fig 1- Wind and Temperature forecasts at 300 hPa and the Geopotential at 500 hPa
However, our meteorologists’ gaze is also turning towards a different area of low pressure (see Figure 2 below, forecast time 00Z on Sunday), which will be developing in the western North Atlantic, about 500 nautical miles southwest of Nova Scotia. This low-pressure system is expected to travel quickly eastwards over the Atlantic this weekend. Current guidance suggests that this low will be on the southern side of the Jet Stream on Friday and will then cross over to the northern left exit region of the Jet Stream on Saturday. This system is then expected to undergo a period of rapid deepening, creating a storm depression as it swings up to the northwest of Ireland around Saturday night or Sunday morning.
Fig 2: Wind and Temperature forecasts at 300 hPa and the Geopotential at 500 hPa
“There is still a lot of uncertainty in the details at this time, but the potential is there for strong winds and therefore a named storm on Saturday night into Sunday” said Liz Walsh, Met Éireann Meteorologist.
Updated information can be expected as the situation evolves and we analyse model data. Keep up to date with the forecast through your usual channels and for live updates, check met.ie or the Met Éireann app.
Heavy Rainfall Event, Weekend of October 5/6th 2024 - UPDATED
UPDATE ON THE HEAVY RAINFALL EVENT FORECAST FOR the weekend of 5th-6th OCTOBER
The following information is valid at 15:30, Friday 4th October 2024 until further updates.
The meteorological situation described yesterday (below) is still valid, with a band of rain expected to trail over the country from Friday night (4th October) through to Saturday night (5th October), with the heaviest and most persistent rain forecast over the southwest and west of the country, particularly over counties Kerry and Cork.
The low pressure system will be slow moving and updates from our models this morning have led to a revision of the warnings issued yesterday. The orange rainfall warnings for Kerry and Cork have been extended for an additional hour to midnight on Saturday (valid from 00:00 Saturday 5th to 00:00 Sunday 6th). Waterford has also been elevated to an orange rainfall warning, valid from 12:00 Saturday to 00:00 Sunday. This is due to a combination of factors: heavy rainfall in mountainous regions, soil conditions which have not recovered from last weekend’s rainfall and the heaviest of the rain coinciding with high tide. All this coupled with fresh to strong onshore winds which will exacerbate river levels.
Figure 1 – Rainfall warnings issued by Met Éireann for Saturday 5th October (valid at time of writing on Friday 4th October)
Accumulations of 30-50 mm over 24h are likely in the counties under yellow warning, however rainfall amounts may be higher on windward slopes of the mountains in west Galway and west Mayo. Parts of Cork, Kerry and Waterford will see totals of 50-70 mm over a 24h period, but similarly, higher accumulations can be expected in mountainous regions of west Kerry and west Cork.
Figure 2 –24 Hour Precipitation Ensemble Forecast Probability Maps, available to the public here ( 24 Hour Precipitation – Met Éireann – The Irish Meteorological Service). The image shows the probability of rainfall accumulations over certain thresholds for this Saturday 5th October to Sunday 6th October.
In view of this, updates to potential impacts expected are:
Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any updates to the warnings.
The timing and location of weather can significantly affect its impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and degree of impacts can be strongly affected by previous weather conditions. Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions, that may increase the level of impact expected for particular areas when issuing a warning.
WHAT SHOULD YOU DO PRIOR TO AND DURING EXTREME WEATHER? PUBLIC SAFETY INFORMATION AND MESSAGES FROM EMERGENCY MANAGEMENT STAKEHOLDERS
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METEOROLOGICAL SITUATION
The following information is valid at 18:00, Thursday 3rd October 2024 until further updates.
Through Friday night (4th October) and into Saturday (5th October) a broad area of low pressure will move over Ireland introducing a milder and moist airmass. The progression of this system across Ireland will be stalled due to high pressure over central Europe. A band of rain associated with this system is expected to trail over the country through Saturday 5th October, with the heaviest and most persistent rain forecast over the southwestern and west of the country, particularly over counties Kerry and Cork.
Figure 1 – Rainfall forecast for Friday (4th October) to Sunday (6th October)
Deputy Head of Forecasting Liz Coleman said: “Friday will be a cloudy and damp day with rain and drizzle in many areas, but the impactful rain will start from Friday night onwards and the rain will be heavy and persistent in many areas for much of Saturday.
Through Saturday, high pressure in the mid-Atlantic, together with an area of low-pressure further north, will work in tandem to drag warm tropical air up over the country. As we know, the warmer the air, the higher its ability to hold moisture, so this event has the potential to be quite impactful.”
Figure 2 – Airmass Temperature and Surface Pressure chart, showing area of low-pressure (L) to the west of Ireland, working in tandem with an area of high-pressure (H) in the mid-Atlantic, which has its origin over warm seas in the tropics (dark orange and red airmass)
Liz Coleman continues: “While much of the west and southwest are forecast to receive over 30mm of rain in a 24h period, our models are currently predicting in excess of 50mm of rain over parts of southwest Kerry and west Cork, with higher accumulations possible in mountainous areas.”
Figure 3 –24 Hour Precipitation Ensemble Forecast Probability Maps, available to the public here ( 24 Hour Precipitation – Met Éireann – The Irish Meteorological Service). The image shows the probability of rainfall accumulations over certain thresholds for this Friday 4th October and Saturday 5th October.
At the time of writing, Met Éireann has issued an ORANGE rainfall warning for counties Cork and Kerry (Valid: 00:00 to 23:00 Saturday 05/10/2024) and a YELLOW rainfall warning for counties Clare, Limerick, Waterford, Galway and Mayo (Valid: 00:00 Saturday 05/10/2024 to 00:00 Sunday 06/10/2024).
In view of the situation, potential impacts expected are:
The warnings are likely to be updated. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecast and any warnings’ updates.
The timing and location of weather can significantly affect its impact. It’s important to note that in any individual weather event, not every location within a warning area may experience the same degree of weather or impacts.
When severe weather is expected, weather and impacts at lower levels are also likely to be experienced. The type and degree of impacts can be strongly affected by previous weather conditions. Met Éireann takes into consideration the forecasted conditions and thresholds, as well as previous weather conditions, that may increase the level of impact expected for particular areas when issuing a warning.
WHAT SHOULD YOU DO PRIOR TO AND DURING EXTREME WEATHER? PUBLIC SAFETY INFORMATION AND MESSAGES FROM EMERGENCY MANAGEMENT STAKEHOLDERS
Meteorologists Commentary – Storm Lilian
Storm Lilian has been named by the UK Met Office – what impacts can we expect in Ireland?
Below valid at 12pm on Thursday 22nd August 2024.
The low-pressure system which will deepen and become Storm Lilian over the next 24 hours can be seen in the mid-Atlantic on the 00 UTC surface analysis chart with its associated fronts.
Fig 1: Surface analysis chart 00UTC
Wind Impacts
While the main impacts associated with Storm Lilian will be felt across the UK in the early hours of tomorrow morning, Met Éireann have issued yellow level wind and rain warnings.
Forecaster Brandon Creagh said: “The centre of the low pressure system is expected to track across the middle of country tonight, bringing unseasonably strong and gusty south to southwest winds which will veer west to northwest as the system tracks eastwards.
The strongest of the winds will occur overnight but with the trees still in full leaf, people need to be careful of debris or branches on the roads tomorrow morning.”
Fig 2: Model output wind and gusts.
Gale warnings are also in effect in eastern and southern sea areas.
Ireland is currently in a period of very high tides. There is a High Tide Advisory in effect for all coasts of Ireland, expiring at 12:00 noon tomorrow, Friday, leading to the continued risk of coastal flooding and wave overtopping on coasts affected by onshore winds.
Rainfall Impacts
This system will also bring heavy rainfall over a short time period with current model output showing the likelihood of exceeding 20mm accumulations over a 6 hour period overnight.
Fig 3: Model output cloud and rainfall.
Status yellow rainfall warnings are in effect for a number of counties. Potential impacts from this heavy rainfall include:
Storm Lilian is the first “L” named storm since storm naming commenced in 2015.
Why was the name “Lilian” chosen?
Storm Lilian is named after Lilian Bland, who was an Anglo-Irish journalist and pioneer aviator. She was the first woman in Ireland to build and fly an aircraft, and quite possibly the world’s first woman to build her own airplane, the Bland Mayfly.
For further information on storm naming check https://www.met.ie/forecasts/storm-names.
An unseasonably wet and blustery August bank holiday weekend.
Update – Sunday August 4th 2024
A low-pressure system will steer weather fronts over the country on Sunday and Monday.
This system will bring warm and very moist air, and this has the potential to produce heavy and intense spells of rain, which will fall in a relatively short time.
Expected impacts from the heavy rain will be surface and river flooding as well as disruption to travel.
There are yellow rainfall warnings in place on Sunday for Clare, Donegal and Connacht.
The warnings start at midday and run through to midday on Bank Holiday Monday.
The rain has the potential to cause flooding, damage to temporary structures as well as cause difficult driving conditions.
Early tonight, even heavier rain will move in over the country. Orange rainfall warnings have been issued for Galway, Mayo and Donegal.
The warnings will start at midnight on Sunday and will end at 10:00 on Bank Holiday Monday morning.
As this is a Bank Holiday weekend, there will be many people on holiday, and it is important that they take note of the rainfall warnings and take the appropriate steps to protect themselves.
As well as the unseasonably wet conditions there will be strong winds especially along coasts and over exposed ground so people should take care near the coasts.
The impacts from the rain will continue after the weather warnings cease as there is likely to be surface flooding, as well as runoff from fields and surfaced areas and smaller river catchments impacted by the heavy rain may get out of bank.
Updated on Saturday 03rd August 2024
After a rather pleasant end to July, a broad area of low pressure in the north Atlantic will introduce more unsettled conditions for the August bank holiday weekend. This low pressure will steer frontal systems across Ireland, with spells of heavy rain expected on Sunday and Bank Holiday Monday, coupled with fresh to strong and gusty southerly winds along Atlantic coasts.
Met Éireann forecaster Aoife Kealy said “It’ll feel fresher on Saturday but despite that, it will be the best day of the weekend. Though the temperatures will drop back to the mid to high teens, there’ll be plenty of dry spells and some sunshine between the scattered showers.”
The drier and brighter weather will be short-lived, as the next low pressure system in the north Atlantic drives weather fronts across Ireland on Sunday and Monday.
Aoife explained “This low pressure system will drag a warm, moist airmass with it from the mid-Atlantic. That warm, moisture-laden air will act like fuel for this system, meaning the rain that it brings will be heavy.”
Through Sunday afternoon and much of Monday, that heavy rain will move eastwards across the country. The rain will be heaviest in the west and southwest with flooding possible. Becoming blustery also, with fresh and gusty southerly winds developing, strong on western and southern coasts.
It will also be very mild on Sunday night due to the warm airmass that the low pressure system will introduce. Temperatures will not fall below 14 to 17 degrees, so it will be an uncomfortable night for sleeping.
Aoife continued “With the bank holiday weekend, more people will be out and about and they may not expect the unseasonably wet weather and strong winds. Sunday will not start off too bad but don’t let that lull you into a false sense of security. The rain will get progressively heavier through the afternoon and evening with those southerly winds picking up, so make sure to check the forecast and any warnings for your area before heading out.”
Yellow warnings have been issued for heavy rainfall for counties Clare, Galway, Mayo, Sligo, Leitrim and Donegal from Sunday afternoon through to Monday afternoon.
Potential impacts:
Localised flooding
Damage to temporary structures
Difficult travel conditions
Poor visibility
Stay in contact with the forecast over the coming days for the most up to date information on met.ie and on the Met Éireann app, particularly if planning outdoor activities.
Looking ahead to next week, current indications suggest that while it will be largely unsettled with showers and rain at times, no further impactful weather is expected.
Storm Kathleen, Saturday 6th April 2024
Met Éireann have named Storm Kathleen (the 11th storm of the 2023/2024 season).
Below valid at 10am on Friday 5th April 2024.
Storm Kathleen is a significant low-pressure system tracking off the west coast which will bring strong southerly winds and damaging gusts across the country on Saturday.
Met Éireann have issued a nationwide yellow wind warning for Saturday with orange level wind warnings coming into effect for counties Cork, Kerry and Waterford at 7am, valid until 2pm, and counties Galway and Mayo at 9am, valid until 6pm. Storm Kathleen is a dynamic system so there may be updates to the warnings. Please keep in touch with Met Éireann’s social media channels, www.met.ie and the Met Éireann app to stay up to date with the forecasts.
Deputy Head of Forecasting, Liz Coleman said “It is the end of the Easter holidays so there will be a lot of people travelling and they may not be expecting such unseasonably strong and gusty winds. Please make sure to plan your journeys in advance by keeping in contact with the forecast. We are likely to see some trees down due to the saturated soils and strong winds. There will be dangerous conditions at sea too, coupled with wave overtopping and coastal flooding in some areas.”
The rapid deepening of Storm Kathleen is due the interaction of this low-pressure system with a strong southerly jet stream.
The potential impacts of Storm Kathleen are likely to be:
Harmonie model – wind/gust
Storm Kathleen will increase water levels on all coasts as we approach a period of spring tides. This will result in strong coastal winds, a rough sea state and significant waves. Coastal flooding and wave overtopping is likely, especially at times of high tide.
The rain associated with Storm Kathleen will fall on already saturated ground, therefore water will make its way quickly into the rivers. Cumulative rainfall totals could lead to elevated river levels in western and southwestern areas.
It will feel quite mild too for this time of year, as the southerly airflow bring warm air over the country.
Do we frequently get storms in April?
Two storms have been named in April since storm naming began in 2015/2016. Storm Hannah was named by Met Éireann on Fri 26th April 2019, which brought storm force winds to Mace Head. Storm Noa named by Météo France, brought storm force winds to Sherkin island on Wed 12th April 2023.
There was also a storm as late as 14th June 2018, Storm Hector, which brought storm force winds to Mace Head.
Why was the name “Kathleen” chosen?
Storm Kathleen is named after Kathleen “Kay” Antonelli/McNulty and Kathleen Lonsdale. This is one of the 7 names Met Éireann chose for the 2023-24 list. Met Éireann chose names of eminent Irish/Northern-Irish scientists to honour their important contributions to science and benefits for humankind.
Kathleen ‘Kay’ McNulty Mauchly Antonelli: one of the mothers of computer programming.
Kathleen Lonsdale: Irish crystallographer who demonstrated the crystal structure of benzene.
For further information on storm naming check https://www.met.ie/forecasts/storm-names.
First cold snap of 2024 – Friday 05 January 2024
Ireland will experience a respite from the recent wet and windy weather as high pressure builds from the Azores over the weekend and becomes established over Ireland into next week, bringing cold, clear and generally calm conditions with little precipitation.
Figure 1: High Pressure building over Ireland. Colour scale represents airmass temperatures.
Met Éireann meteorologist Liz Coleman explained “It’s going to feel much colder than it has recently, with daytime temperatures in the low single figures and nighttime temperatures falling below zero in most areas. Widespread frost is expected with some ice, although generally dry conditions will limit ice formation to mainly areas of standing water or run off. Nevertheless, do take care while out and about.
While it will be cold, it will be mainly dry with sunny spells as the high pressure will prevent any significant rainfall.
Liz said “There will be showers at times in the north and west over the weekend and in the east through next week but rainfall amounts will be low. So a lot of dry weather in the forecast”.
Figure 2: Rainfall and pressure forecast
Liz continued “The cold temperatures coupled with near calm conditions means fog will also be a feature of our weather, particularly over the weekend. Dense fog patches are likely on Saturday and Sunday night. With little wind to clear the fog, it may linger into the daytime in some areas leading to tricky travelling conditions. Our forecasters will be monitoring the situation and will issue warnings as required.
Make sure to check in on the forecast and warnings for your areas on met.ie
Current indications suggest that high pressure will be in control of our weather until next weekend when the models show a breakdown to more unsettled, but still cold weather. Although there is a lot of uncertainty that far ahead in the forecast.
The latest weather advisories and warnings for Ireland are on the Met Éireann Warnings page. These services and more are available on our free app – available from the App store for iPhone, and Play store for Android. Visit our Weather Warnings page.
For advice and information on staying save in severe weather, please consult www.winterready.ie
Unsettled weather to end 2023 but a bright start to 2024!
A slow moving low pressure system will dominate Ireland’s weather over the weekend, bringing strong and gusty winds through Saturday and into Sunday, which will be accompanied by heavy rain and thundery showers.
Figure 1: Low pressure tracking across the country this weekend
Met Éireann meteorologist Liz Coleman said “There is a lot of weather coming our way over the weekend. South-easterly winds will veer westerly and intensify on Friday night as a band of rain crosses the country. The rain will be heavy at times with localised flooding possible, leading to difficult travelling conditions. Gales along coasts coupled with spring tides may lead to wave overtopping on exposed coasts”.
Figure 2: Wind Forecast
Met Éireann have issued wind and rain warnings. Details can be found on the Weather Warnings page.
There will be some respite from the rain through the afternoon on Saturday as it clears into the Irish sea by the afternoon. However southwest to west winds will continue strong and gusty steering some heavy and possibly thundery showers over mainly the western of the country through Saturday.
Liz continued “By Sunday morning (New Years Eve) the winds will have veered northwesterly with counties Clare, Cork and Kerry experiencing the most intense winds with the ongoing potential for wave overtopping in coastal areas. A mix of sunny spells and scattered showers are expected countrywide for the rest of the day.
Figure 3: Rainfall and Cloud forecast
The showers and winds will ease somewhat for midnight New Years celebrations with a sunny start in many areas on New Years Day and isolated showers. Cloud will thicken from the southwest through the afternoon with a further spell of rain late on Monday.
Make sure to check in on the forecast and warnings for your areas when making plans for the weekend on met.ie
The latest weather advisories and warnings for Ireland are on the Met Éireann Warnings page. These services and more are available on our free app – available from the App store for iPhone, and Play store for Android. Visit our Weather Warnings page.
For advice and information on staying save in severe weather, please consult www.winterready.ie
Deireadh seachtaine d’aimsir stoirmeach
Leis an Meitéareolaí, Michelle Dillon
Tá scairdsruth gníomhach an deireadh seachtaine seo ag forbairt agus ag doimhniú na gcóras ísealbhrú amuigh san Atlantach agus aimsir stoirmeach á seoladh ar fud na hÉireann dá bharr.
Tá dhá stoirm ainmnithe ag Met Éireann, an 5ú agus an 6ú stoirm den séasúr reatha ainmnithe stoirme, Stoirm Elin & Stoirm Fergus. Ainmníodh Stoirm Elin thar oíche, agus tá sí ag dul i bhfeidhm ar Éirinn inniu, le rabhaidh ghaoithe oráiste do Dhún na nGall, Baile Átha Cliath & Cill Mhantáin ar feadh tamaill. Ainmníodh Stoirm Fergus ar maidin, agus beidh tionchar aici ar Éirinn níos deireanaí amárach agus go luath san oíche amárach (Dé Domhnaigh an 10 Nollaig), le rabhaidh ghaoithe oráiste don Chlár, do Ghaillimh & do Mhaigh Eo. Tá rabhaidh ghaoithe bhuí eisithe don dá theagmhas le haghaidh go leor contaetha chomh maith le rabhadh báistí buí do Dhún na nGall inniu. Le haghaidh tuilleadh sonraí ar rabhaidh, seiceáil met.ie/warnings.
Stoirm Elin, Dé Sathairn an 9 Nollaig
Ag féachaint ar dtús ar Stoirm Elin. Oíche Dé hAoine, d’fhorbair Stoirm Elin tríd an teagmháil a rinne bealach amach ar chlé le scairdstríoc le log fadaithe dromchla amach ó iarthar na hÉireann. Ansin ghluais Elin soir go tapa thar thuaisceart na tíre ar maidin, rud a ghin gaotha aniar go aniar aduaidh láidre go fórsa gála thar tír. Leanfaidh an lárphointe stoirme ag bogadh soir thar Albain tráthnóna, ach le gaotha aniar go aniar aduaidh láidre go fórsa gála agus scuabacha ina dhiaidh. Maolóidh na gaotha sin go luath anocht de réir a chéile.
Tá cairt anailíse ina léirítear forbairt Stoirm Elin thíos:
Cairt ina léirítear an scairdsruth agus an patrún brú thíos: D’fhorbair Stoirm Elin sa cheantar a aibhsíodh thuas áit a dteagmhaíonn log fadaithe le bealach amach ar chlé le scairdstríoc.
Taispeántar éabhlóid Harmonie de Stoirm Elin thíos:
Stoirm Fergus, Dé Domhnaigh an 10 Nollaig
Leanfaidh tonnlogán atá ag doimhniú go tapa, atá á chruthú i lár an Atlantaigh faoi láthair agus é ag teagmháil le bealach amach ar chlé le scairdstríoc, ag tiontú go Stoirm Fergus agus í ag druidim ón iardheisceart tríd an lá inniu, anocht agus amárach. Bhí brú 996hpa aige ar dtús, agus meastar go ndoimhneoidh sé go dtí thart ar 968hpa amach san Atlantach go luath anocht, agus mar sin go gcomhlíonfaidh sé leis na critéir maidir le cioclónghineas tapa. Líonfaidh sé beagáinín ansin agus é ag dul i dtreo na hÉireann, agus meastar go dtiocfaidh sé i dtír tráthnóna amárach ar chósta an iarthair agus brú lárnach de thart ar 980hpa aige. Dúirt Meitéareolaí Met Éireann, Michelle Dillon: “Beidh gaotha láidre go fórsa gála aniar aneas ag athrú aniar ag forbairt tráthnóna Dé Domhnaigh, tráthnóna agus luathoíche Dé Domhnaigh agus Stoirm Fergus ag dul soir ar fud na tíre, ag líonadh beagáinín mar a théann sí. Beidh farraigí arda mar thoradh ar bhorradh stoirme agus chomh maith leis na dálaí stoirmeacha, tá baol ann go mbeidh tuilte cósta ar feadh codanna den chósta thiar, go háirithe ag lán mara.”
Cairt anailíse ag 12Z an 9 Nollaig, ina léirítear forbairt Stoirm Fergus agus í fós go maith amach san Atlantach.
Cairt ina léirítear an scairdsruth agus an patrún brú thíos: Tá Stoirm Fergus ag forbairt ó thonnlogán áit a bhfuil sí ag teagmháil le bealach amach ar chlé le scairdstríoc.
Tá éabhlóid Harmonie Stoirm Fergus le feiceáil thíos:
Farraigí arda nó an-ard amach ó chósta an iarthair amárach:
Mairfidh an tréimhse fhuar an deireadh seachtaine seo agus isteach go tús na seachtaine seo chugainn.
Tá níos mó cinnteachta ann go mairfidh an tréimhse fhuar reatha go dtí oíche Dé Máirt. Tá rabhadh teochta ísle/oighir buí i bhfeidhm ar fud na tíre ó thráthnóna Dé hAoine go dtí tráthnóna Dé Domhnaigh de réir mar a fhorbraíonn réimsí forleathana seaca agus oighreata. Tá rabhadh ceo buí i bhfeidhm ar fud na tíre don tréimhse chéanna de réir mar a thagann ceo tiubh agus roinnt paistí ceo seaca, rud a chuirfidh leis na dálaí guaiseacha atá ann cheana féin. Déanfar monatóireacht agus athbhreithniú/leathnú ar na rabhaidh más gá, mar sin coinnigh suas leis an réamhaisnéis.
Mhínigh an meitéareolaí Aoife Kealy an scéal; “Beidh ceathanna scaipthe ann don Aoine agus don deireadh seachtaine. Titfidh an chuid is mó díobh sin mar bháisteach ach beidh roinnt clocha sneachta, flichshneachta agus sneachta ann uaireanta. Ansin, oíche Dé Domhnaigh beidh córas ísealbhrú ag dul thar an gcósta theas. D’fhéadfadh sé sin roinnt báistí agus ceobhráin a chruthú i gcontaetha an chósta thoir agus theas, agus d’fhéadfadh roinnt flichshneachta a bheith ann freisin. Níl an chuma ar an gcóras sin go mbogfaidh sé suas ar fud na tíre, agus fágfaidh sé sin go leanfar leis na dálaí fuara.”
Is minic a bheidh teochtaí i rith an lae sna laethanta amach romhainn idir 1 agus 5 chéim, agus is minic a thitfidh teochtaí oíche go 0 go -4 céim nó faoina bhun. Mar thoradh air sin, beidh réimsí seaca agus oighir forleathana ann, in éineacht le limistéir ceo tiubh agus ceo seaca.
Dúirt Aoife freisin, “Toisc go mbeidh sé chomh fuar sin, beidh an sioc agus an t-oighear ag fanacht in áiteanna i rith an lae. Tógfaidh sé tamall ar na limistéir cheo agus ceo seaca glanadh ó áiteanna i rith an lae freisin. Tiocfaidh sé sin go léir le chéile chun dálaí contúirteacha taistil, drochléargas agus dálaí sleamhna a chruthú faoi chois.”
Beidh an Luan agus an Mháirt fuar ach tirim do go leor daoine. Mar sin féin, beidh cúpla cith ann uaireanta san oirthear agus san oirdheisceart agus arís eile, d’fhéadfaidís sin tiontú ina gclocha sneachta agus flichshneachta, agus seans sneachta ar thalamh ard ann.
Lean Aoife ar aghaidh, “I láthair na huaire, tá an chuma ar an scéal go bhfanfaidh an tréimhse fhuar seo linn Dé Luain ar fad agus Dé Máirt don chuid is mó. Ina dhiaidh sin, de réir na gcomharthaí reatha, scaipfidh córas ísealbhrú ón Atlantach níos déanaí Dé Máirt agus Dé Céadaoin, rud a fhágann go mbeidh báisteach fhorleathan agus dálaí níos séimhe ann. Mar sin féin, tá seans ann, de réir mar a dhéanann an bháisteach sin teagmháil leis an aer fuar os ár gcionn, go bhféadfadh cuid de titim mar fhlichshneachta nó sneachta. Ach beidh sé sin gearrshaolach, mar tiocfaidh an t-aer níos séimhe isteach go tapa.”
Don réamhaisnéis is cruinne agus is cothroime le dáta do do cheantar, tabhair cuairt ar www.met.ie.
Chun comhairle a fháil maidir le hullmhú d’aimsir gheimhridh, tabhair cuairt ar www.winterready.ie.
Tréimhse fhuar agus muid ag druidim leis an nGeimhreadh Meitéareolaíoch
Tosóidh an geimhreadh meitéareolaíoch Dé hAoine 1 Nollaig. Agus an dáta sin ag druidim linn, bunófar aershreabh ó thuaidh ar fud na hÉireann, a mbeidh dálaí i bhfad níos fuaire mar thoradh air, agus sioc forleathan ann agus roinnt oighir ag forbairt gach oíche. Beidh ceathanna ó am go chéile tríd an tseachtain freisin, a d’fhéadfadh a bheith geimhriúil, ach beidh na ceathanna sin éadrom go leor agus carnadh báistí fíorbheag ann.
Cé chomh fuar is a bheidh sé?
Mhínigh meitéareolaí Met Éireann Aoife Kealy, “Beidh aermhais Artach ag sleamhnú síos tharainn an tseachtain seo, rud a fhágann go mbeidh dálaí i bhfad níos fuaire ann ná mar a bhí againn le déanaí. Is ar éigean go n-éireoidh teochtaí i rith an lae os cionn 5 chéim, go háirithe ón gCéadaoin ar aghaidh. Beidh teochtaí oíche gar don reophointe, nó faoi, i rith na seachtaine freisin i gcaoi is go mbeidh sioc forleathan agus roinnt oighir ann. Anuas air sin, fágfaidh gaotha éadroma go dtiocfaidh ceo thar oíche, agus é ag éirí tiubh in áiteanna. Is go mall a ghlanfaidh aon sioc, oighear agus ceo ar maidin, agus beidh sé deacair taisteal in amanna. Mar sin, beidh gá le cúram breise ar na bóithre.”
An mbeidh sé fliuch nó tirim?
Cé go mbeidh sé fuar, beidh an tseachtain tirim den chuid is mó le roinnt tréimhsí géine. Is minic a bheidh brú ard gar d’Éirinn tríd an tréimhse, rud a fhágann go mbeidh dálaí socra go ginearálta, agus go gcuirfear cosc ar aon bháisteach shuntasach.
Lean Aoife ar aghaidh “D’fhéadfadh paistí báistí a bheith ann ó dheas oíche Dé Céadaoin, agus beidh cúpla cith ann uaireanta, go háirithe sa tuaisceart agus san oirthear, ach beidh na ceathanna sin éadrom. Mar sin, tríd is tríd beidh neart aimsire tirime ann.”
Agus an mbeidh sneachta ann?
Dúirt Aoife, “Mar gheall ar na dálaí fuara Déardaoin agus Dé hAoine, is féidir go luífeadh roinnt ceathanna chun cloch sneachta nó flichshneachta, agus seans go mbeidh sneachta éigin ann, go háirithe thar thalamh níos airde. Ach fiú nuair a éireoidh na ceathanna geimhriúil, beidh carnadh an-bheag ann.”
Cá fhad a mhairfidh an tréimhse fhuar?
Méadaíonn an éiginnteacht ón deireadh seachtaine ar aghaidh. Tugann na comharthaí reatha le fios go bhfanfaidh na dálaí níos fuaire ná an meán agus ceathanna breise ann, ag éirí geimhriúil in amanna. Mar sin féin, d’fhéadfadh roinnt tréimhsí báistí níos faide a bheith ann má thrasnaíonn aer níos séimhe sinn ón deisceart.
Don réamhaisnéis is cruinne agus is cothroime le dáta do do cheantar, tabhair cuairt ar www.met.ie.
Chun comhairle a fháil maidir le hullmhú d’aimsir gheimhridh, tabhair cuairt ar www.winterready.ie.
eisithe: 1600u Dé Luain 27 Samhain 2023
Aimsir an-luaineach ag deireadh mí Dheireadh Fómhair agus tús mhí na Samhna agus Stoirm Chiaráin ar an mbealach
D’ainmnigh Oifig Meitéareolaíochta an RA Stoirm Chiaráin Dé Domhnaigh an 29 Deireadh Fómhair. Tá an stoirm le dul gar do chósta theas na hÉireann oíche Dé Céadaoin, an 1 Samhain. Leanfar le ceathanna agus tréimhsí níos faide báistí tríd an deireadh seachtaine Saoire Bainc agus isteach sa tseachtain seo chugainn roimh Stoirm Chiaráin.
Tá comhairle aimsire eisithe do na laethanta amach romhainn mar go bhfuil tionchar ag an aimsir luaineach ar fud na tíre i gcónaí.
Comhairle d’Éirinn
Dé Luain, Dé Máirt agus Dé Céadaoin, beidh ceathanna troma nó tréimhsí báistí níos faide ag amanna ar fud na hÉireann agus is dócha go mbeidh tuilte in áiteanna, mar go bhfuil ithreacha ar maos in uisce agus go bhfuil leibhéil na n-aibhneacha ard.
Níos déanaí Dé Céadaoin agus Déardaoin, tabharfaidh Stoirm Chiaráin báisteach throm agus gaotha láidre léi. Tugann na comharthaí reatha le fios go mbeidh an bháisteach is troime agus na gaotha is láidre i gCúige Mumhan agus i gCúige Laighean agus gur dócha go mbeidh tuilte ann.
Tionchair Bhreise:
Drochléargas,
Coinníollacha tiomána deacra/contúirteacha
Bailí: 14:40 Dé Domhnaigh 29/10/2023 go 23:30 Déardaoin 02/11/2023
Eisithe: 14:41 Dé Domhnaigh 29/10/2023
Beidh brú íseal fós i réim ar aimsir na hÉireann don tseachtain amach romhainn, rud a fhágfaidh go mbeidh tuilleadh ceathanna troma agus báistí ann. Agus méideanna suntasacha báistí ann le roinnt seachtainí anuas, tá coinníollacha na talún ar fud na tíre ar maos in uisce nó báite, agus tá go leor aibhneacha ard. Mar thoradh air sin, tá an baol tuilte sna laethanta amach romhainn méadaithe.
Dúirt meitéareolaí Met Éireann Aoife Kealy “Fiú inniu (Dé Domhnaigh), fágfaidh ceathanna troma go mbeidh baol tuilte áitiúla ann, go háirithe do cheantair an iarthair agus do lár na tíre thuaidh. Mar sin, tá rabhadh báistí buí i bhfeidhm don Chabhán, do Mhuineachán, do Chonnachta, don Longfort, do Lú agus don Iarmhí go dtí 9pm Dé Domhnaigh.”
Tabhair cuairt ar ár leathanach Rabhadh Aimsire.
Is beag faoiseamh a bheidh ann ón mbáisteach roimh Stoirm Chiaráin, mar go leanfar le ceathanna agus tréimhsí báistí Dé Luain agus Dé Máirt.
Lean Aoife ar aghaidh “Cuirfidh ceathanna troma eile Dé Luain le carnadh báistí atá ard cheana féin. Ansin, beidh báisteach níos forleithne a d’fhéadfadh a bheith trom Dé Máirt ina cúis le meath breise ar dhálaí talún agus ar leibhéil abhann. Mar sin, beidh baol leanúnach tuilte áitiúla ann agus muid ag bogadh isteach sa tseachtain seo chugainn.”
Is dócha go gcuirfidh an aimsir fhliuch sin i dtús na seachtaine seo chugainn le tionchar Stoirm Chiaráin tráthnóna Dé Céadaoin agus Déardaoin. Tugann na comharthaí reatha le fios go ngluaisfidh an stoirm thar ár gcósta theas tráthnóna agus oíche Dé Céadaoin sula mbogfaidh sí soir ó thuaidh trí Mhuir Éireann agus thar an Ríocht Aontaithe (féach Léaráid 2 thíos). De réir mar a théann sí tharainn, tabharfaidh sí aimsir an-fhliuch agus ghaofar léi, le báisteach throm in áiteanna. Agus dálaí fliucha ann cheana féin roimh Stoirm Chiaráin, beidh baol tuilte níos airde ann, agus d’fhéadfadh gaotha láidre cur isteach ar chúrsaí freisin.
Figiúr 2: Gluaiseacht thuartha reatha Stoirm Chiaráin oíche Dé Céadaoin
Faoi láthair, tá éiginnteacht áirithe fós ann maidir leis an treo a rachaidh Stoirm Chiaráin, ach is dóichí ná a mhalairt go ngluaisfidh sí thar chósta theas na hÉireann. Is féidir nuashonruithe ar an réamhaisnéis agus rabhaidh amach anseo sna laethanta romhainn a fháil ag https://www.met.ie/warnings
Chun comhairle agus faisnéis a fháil maidir le fanacht sábháilte in aimsir throm, féach www.winterready.ie
Tá báisteach throm a bhaineann le Stoirm Babet fós ag dul i bhfeidhm ar Éirinn - nuashonraithe Dé Céadaoin
Tá limistéar coimpléascach ísealbhrú a bhfuil roinnt frontaí leabaithe ann, ar a dtugtar Stoirm Babet, ag bogadh suas thar an Ríocht Aontaithe inniu, Dé Céadaoin an 18ú lá, agus a fhrontaí aimsire ag tabhairt bandaí báistí troime ar fud na hÉireann
Ón íomhá shatailíte thuas is féidir linn bandaí móra scamall a fheiceáil ag síneadh ón bpríomh-lárphointe ísealbhrú díreach os cionn thuaisceart na Fraince. Thug na bandaí scamall sin go leor báistí ar fud chontaetha an deiscirt Dé Máirt agus inniu (Dé Céadaoin).
Bhí rabhaidh bháistí oráiste ag Met Éireann do Chorcaigh, do Chiarraí agus do Phort Láirge, agus tuairiscíodh carnadh suntasach báistí sna contaetha sin ó mhaidin Dé Céadaoin.
Dúirt meitéareolaí Met Éireann Mark Bowe “fuair ceantair chósta i gCorcaigh an chuid is measa den bháisteach, agus bhí tuairiscí ann faoi thuilte agus bóithre á ndúnadh.”
Lean Bowe ar aghaidh, “tá an bháisteach throm fós ag bogadh ó thuaidh, agus mar sin tá síneadh curtha againn lenár rabhadh oráiste i bPort Láirge go dtí níos déanaí tráthnóna inniu, agus chuir muid Loch Garman agus Cill Mhantáin leis na rabhaidh oráiste freisin.”
Tá báisteach throm leanúnach le bogadh thar na contaetha sin ó dheas inniu, agus is dócha go mbeidh tuilte ann is go gcuirfear isteach go mór ar chúrsaí taistil.
De réir mar a leanann na frontaí a bhaineann le Babet ag bogadh ó thuaidh ar fud na tíre, is féidir linn a bheith ag súil le báisteach throm ag amanna i ngach contae agus, leis sin, tá rabhaidh bháistí ar leibhéal buí curtha i bhfeidhm ar fud na tíre ag Met Éireann.
Leanfaidh na rabhaidh sin ar aghaidh go dtí níos déanaí tráthnóna nuair a bhogfaidh an bháisteach throm dheireanach amach ó thuaisceart na tíre anocht
Léaráid 2: Réamhaisnéis Bháistí HARMONIE
Ag féachaint chun cinn go dtí deireadh na seachtaine, luaigh Bowe, “fanfaidh an aimsir fhliuch agus luaineach linn tar éis do Babet a bheith imithe, is baolach. Fanfaidh an brú íseal i réim, agus beidh múraíl nó tréimhsí báistí ar fud na tíre díreach amach go dtí an deireadh seachtaine, agus an baol ann go bhféadfadh tuilleadh rabhadh báistí buí a bheith ann.”
Tá réamhaisnéiseoirí ag déanamh monatóireachta ar éabhlóid Stoirm Babet agus ar a héifeachtaí de réir mar a théann sí thar an tír, mar sin bí cinnte bheith sábháilte agus fanacht cothrom le dáta leis na rabhaidh is déanaí ar www.met.ie/warnings
Léaráid 3: Réamhaisnéis Mheánbhrú na Farraige & Bháistí ECMWF (Lárionad Eorpach do Réamhaisnéisí Aimsire Meánraoin)
Táimid ag coinneáil súil ghéar ar fhorbairt na n-imeachtaí sin. Fan sábháilte, agus coinnigh suas chun dáta leis na nuashonruithe breise agus na rabhaidh is déanaí ar https://www.met.ie/warnings.
Stoirm Agnes
Tá Stoirm Agnes ainmnithe ag Oifig Met na RA maidin Dé Luain 25ú de Meán Fómhair. Tá an t-imeacht suntasach aimsire seo le cur ar an talamh titim os cionn na hÉireann Dé Céadaoin 27ú de Meán Fómhair. Sular tháinig sé, tá roinnt rabhadh gaoithe agus báistí eisithe ag Met Éireann ar fud na gcontaetha i gCúige Laighean agus i gCúige Mumhan. Tá rabhaidh eisithe ag Oifig Meitéareolaíochta na Ríochta Aontaithe do Chúige Uladh freisin.
Tá an stoirm forbartha seo amuigh i lár an Atlantaigh faoi láthair. Léiríonn ár gcairt anailíse is déanaí an córas aimsire ina chéim tosaigh.
Taispeánann an íomhá satailíte infridhearg ó 12Z Dé Luain an 25ú Meán Fómhair an mais mór scamall a fhorbróidh ina Stoirm Agnes ar deireadh thiar.
Thar na huaireanta agus na laethanta amach romhainn beidh an réimse seo de bhrú íseal ag forbairt suas ag an scairdsruth agus dul faoi doimhniú tapa.
Léirítear thíos an tuar scairdsrutha ó mhúnla an Ionaid Eorpaigh um Réamhaisnéisí Aimsire Meánraoin (ECMWF). Béim i ngorm tá Stoirm Agnes a múnlaíodh ag 12Z inniu an 25ú Meán Fómhair.
Storm Agnes development on Monday September 25th
Ag bogadh ar aghaidh 24 uair eile go dtí 12Z Dé Máirt an 26ú Meán Fómhair is féidir linn a fheiceáil go bhfuil an t-íseal tar éis bogadh trasna an Atlantaigh, á thógáil suas ag an scairdsruth. Tá sé méadaithe go suntasach freisin.
Ag breathnú ar aghaidh go dtí 06Z ar an gCéadaoin an 27ú Meán Fómhair, an lá a dtiocfaidh an stoirm i dtír, is féidir linn a fheiceáil conas a d’aistrigh an brú íseal go dtí an taobh thuaidh den scairdshruth agus go ndearnadh é a dhoimhniú tuilleadh.
Stoirm Agnes
Is dócha go dtiocfaidh Stoirm Agnes i dtír go déanach maidin Dé Céadaoin agus faoi láthair tá roinnt rabhaidh aimsire eisithe mar fhreagra. Is dócha go ndéanfar na rabhaidh seo a nuashonrú de réir mar a bheidh tuilleadh sonraí samhaltaithe ar fáil.
Faoi láthair, meastar go mbeidh tionchar ag na gaotha is láidre ar dheisceart agus oirdheisceart na tíre. Mar sin féin, léiríonn an treoir is déanaí ónár gcóras ardtaifigh tuar ensemble, IREPS, an neamhchinnteacht atá ann faoi láthair maidir le rian cruinn Stoirm Agnes.
Léiríonn gach ponc san íomhá thuas cá bhfuil réamhaisnéis aonair ó IREPS tar éis lár an chioclón a thuar thar Éirinn.
Agus muid ag druidim níos gaire don imeacht, beidh IREPS in ann níos mó cinnteachta a thabhairt maidir le rian cruinn Stoirm Agnes.
Táimid ag déanamh monatóireacht ghéar ar fhorbairt na stoirme seo agus eiseofar nuashonruithe breise ar ár rabhaidh. Coinnigh suas chun dáta leis na rabhaidh is déanaí ar https://www.met.ie/warnings.
Tús te don Fhómhar
Arna eisiúint ar 5ú Meán Fómhair 2023
Tar éis Iúil agus Lúnasa an-fhliuch agus an-chorraithe, tá coinníollacha míne agus socraithe den chuid is mó tagtha ar ais don chéad seachtain de Mheán Fómhair.
Tá na coinníollacha te seo mar gheall ar limistéar ísealbhrú siar ón Ibéir atá, mar aon le brú ard thar Chríoch Lochlann, ag cur aer te agus tais ar fud na hÉireann.
Fig 1: Teocht Mais Aeir ECMWF don chuid eile den tseachtain (Teocht Féideartha Bolgáin Fhliucha 850mb)
Míníonn Meitéareolaí le Met Éireann Emer Flood, “Tá an chuma ar an scéal go mbeidh brú ard chun tosaigh ar ár n-aimsir don chuid eile den tseachtain, rud a fhágann go bhfuil coinníollacha míne agus socraithe go ginearálta. Sroichfidh teochtaí i rith an lae go luath sna 20idí i gcuid mhór den tír, agus sroichfidh codanna de lár na tíre theas 25°C nó os a chionn. Beidh na teochtaí te seo i rith an lae in éineacht le teochtaí oíche nach dtitfidh aon níos ísle ná na déagóirí luatha as a dtiocfaidh roinnt coinníollacha codlata míchompordacha sna laethanta amach romhainn.
Fíor 2: Teocht Uasmhéid agus Íosta Harmonie don Chéadaoin (6ú de Meán Fómhair)
Aréir taifeadadh íosteocht 20.7°C i nDairbhre, arb í an chéad oíche trópaiceach den bhliain a taifeadadh go sealadach.
Deir Sandra Spillane, clíeolaí le Met Éireann, “Thaifeadamar teochtaí os cionn 25.0°C ag roinnt dár stáisiúin inné (Dé Luain an 5ú de Meán Fómhair) agus mar sin beimid ag coinneáil súil ghéar ar na teochtaí sna laethanta amach romhainn féachaint an mbaintear amach critéir na dtonn teasa”.
Tarlaíonn tonn teasa ag stáisiún Met Éireann nuair a bhíonn an t-uasteocht aeir scáthaithe laethúil níos airde ná cúig ghrád is fiche Celsius (> 25.0°C) ar feadh cúig lá nó níos mó as a chéile. Tá tuilleadh eolais ar dhálaí teo le fáil inár nIonad Samhraidh.
Mar sin an bhfanfaidh an aimsir bhreá linn don deireadh seachtaine?
Leanann Emer uirthi, “Cé go bhfeicfidh go leor ceantar aimsir bhreá agus thirim an deireadh seachtaine, beidh báistí ann uaireanta, san iarthar Dé Céadaoin, ach níos faide soir i dtreo dheireadh na seachtaine le seans ann go mbeidh stoirmeacha ann.”
“Tá meath ag teacht ar aimsir níos fuaire agus níos corraithí sna samhlacha go luath an tseachtain seo chugainn cé go bhfuil go leor éiginnteachta fós ag an bpointe seo”.
Chun an réamhaisnéis is cruinne agus is déanaí do do cheantar ar Oileán na hÉireann a fháil téigh chuig met.ie. Tá na comhairleacha aimsire agus na rabhaidh is déanaí d’Éirinn ar fáil ar leathanach Rabhaidh Met Éireann. Tá na seirbhísí seo agus níos mó ar fáil ar ár n-aip saor in aisce – ar fáil ón App Store don iPhone, agus ón Play Store do Android.
Le comhairle a fháil ar conas fanacht sábháilte in aimsir fhíneáil, seiceáil Bí Réidh don Samhradh.
Réamhaisnéisí