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  1. Maynooth Eclipse Weather Watch

    As I mentioned last week, the Department of Physics at Maynooth University will be hosting an Eclipse Event, this week on Wednesday August 12th. This sold out very quickly so we expect a good turnout. In the last few days we have been featured prominently in articles in the Irish Times and The Journal and on the RTÉ website. Although it is officially full, there may be a few returns, so it is worth checking on the day to see if we can fit you in.

    The viewing of the eclipse will of course depend on the weather, but we have talks lined up indoors and a pop-up planetarium so I hope people will turn up even if the weather isn’t great. I’ve been checking the forecast on the Met Éireann app quite regularly. As of last week it wasn’t very good, with cloud and rain likely but since then it has improved. In the light of my recent post that one can’t really trust Irish weather forecasts more than three days in advance, I thought it would be fun to track the forecast until the big event to see how stable it is.

    Here are the summaries for yesterday (Saturday, when it only gave a prediction every three hours for Wednesday), and today (Sunday, where there is an hourly forecast). The peak of the (partial) eclipse is around 7pm (19.00 hours) in Maynooth.

    Saturday ForecastSunday ForecastMonday ForecastTuesday Morning Forecast (7am)Tuesday Evening Forecast (5pm)Wednesday Morning Forecast (7am)Wednesday Afternoon Forecast (3pm)

    As you can see, the Sunday forecast predicts the temperature on Wednesday to be rather high, with little chance of rain, though with more cloud than the Saturday forecast. I’ll update on Monday, Tuesday and Wednesday to see how it progresses…

    Update: Wednesday 12th, 7.30am. As you can see from the above the forecast for the eclipse is quite good. There is quite a lot of rain out to the west, but it is tracking noreth-eastwards and most of it is forecast to miss Maynooth.

    The rainfall situation at 7.30am, Wednesday 12th August

    P.S. In the Irish language, “eclipse” can be either urú or éiclips. The former is interesting as it is also the name for a form of initial mutation that occurs certain grammatical situations in Irish, the change at the beginning of a word, where a new letter is placed in front of the original consonant, so that the new letter’s sound replaces (or “eclipses”) the old one.

    #DepartmentOfPhysics #Eclipse #MaynoothUniversity #MetÉireann #PartialSolarEclipse #Wednesday12thAugust
  2. Maynooth Eclipse Weather Watch

    As I mentioned last week, the Department of Physics will be hosting an Eclipse Event, this week on Wednesday August 12th. This sold out very quickly so we expect a good turnout. In the last few days we have been featured prominently in articles in the Irish Times and The Journal and on the RTÉ website. Although it is officially full, there may be a few returns, so it is worth checking on the day to see if we can fit you in.

    The viewing of the eclipse will of course depend on the weather, but we have talks lined up indoors and a pop-up planetarium so I hope people will turn up even if the weather isn’t great. I’ve been checking the forecast on the Met Éireann app quite regularly. As of last week it wasn’t very good, with cloud and rain likely but since then it has improved. In the light of my recent post that one can’t really trust Irish weather forecasts more than three days in advance, I thought it would be fun to track the forecast until the big event to see how stable it is.

    Here are the summaries for yesterday (Saturday, when it only gave a prediction every three hours for Wednesday), and today (Sunday, where there is an hourly forecast). The peak of the (partial) eclipse is around 7pm in Maynooth

    Saturday ForecastSunday Forecast

    As you can see, the Sunday forecast predicts the temperature on Wednesday to be rather high, with little chance of rain, though with more cloud than the Saturday forecast. I’ll update on Monday, Tuesday and Wednesday to see how it progresses…

    P.S. In the Irish language, “eclipse” can be either urú or éiclips. The former is interesting as it is also the name for a form of initial mutation that occurs certain grammatical situations in Irish, the change at the beginning of a word, where a new letter is placed in front of the original consonant, so that the new letter’s sound replaces (or “eclipses” the old one).

    #DepartmentOfPhysics #Eclipse #MaynoothUniversity #MetÉireann #PartialSolarEclipse #Wednesday12thAugust
  3. Irish Weather – The Three-Day Rule

    We got some rain at last. On Friday evening I checked the trusty Met Éireann app and saw this:

    With a west/northwesterly wind I thought there was a good chance we would get a bit of rain, and so it turned out although to be honest there wasn’t that much. I think the greeny-yellowy blobs missed us. There was enough rain to give the garden a little light refreshment but not to make up for the ongoing hosepipe ban. We’ve had several weeks with next to no rain, which is highly unusual.

    I look at the weather outlook quite regularly and have learned one thing in my time in Ireland. The forecast is usually fairly accurate up to about three days in the future but you shouldn’t rely on it beyond that. This week provided a good illustration. Last weekend the forecast predicted rain on Saturday (i.e. yesterday). As the week progressed the forecast changed and rain wasn’t forecast until next Wednesday. Then it rained on Friday evening.

    Here’s the outlook from today:

    You can see that rain is forecast for Wednesday and Thursday, but the rainfall radar map shows why it is so difficult to predict whether rain will fall at a specific location. The rain clouds are rather small and moving rather quickly; the winds are around 25km/h (westerly). At the time of taking that screen grab there had been some light rain, but will the other blobs hit us? The Met Éireann model says “no” but others may well say “yes”. It’s a tough problem to predict this level of detail.

    One thing that I think could be improved is a more reasonable representation of the uncertainty. The outlook for today confidently asserts that the Chance of Preciptation for the rest of today is “0%”. To me that means that it is absolutely impossible that it will rain, and that seems unreasonable to me. Surely there is some chance of rain later today? It doesn’t do much for the credibility of a forecast to claim such certainty. A week or two ago there were no clouds anywhere and “0%” was reasonable, but not today. If it were up to me I’d probably put “<1%” or “<5%” to hedge my bets.

    And then there is the question of what amount of rain we’re talking about. I was on campus on Thursday and a few spots of rain fell then. I only noticed because I was outside, coming back from lunch. That was too little to count as real rainfall, but I wonder what the threshold is?

    #MetÉireann #Rain #Weather
  4. Irish Weather – The Three-Day Rule

    We got some rain at last. On Friday evening I checked the trusty Met Éireann app and saw this:

    With a west/northwesterly wind I thought there was a good chance we would get a bit of rain, and so it turned out although to be honest there wasn’t that much. I think the greeny-yellowy blobs missed us. There was enough rain to give the garden a little light refreshment but not to make up for the ongoing hosepipe ban. We’ve had several weeks with next to no rain, which is highly unusual.

    I look at the weather outlook quite regularly and have learned one thing in my time in Ireland. The forecast is usually fairly accurate up to about three days in the future but you shouldn’t rely on it beyond that. This week provided a good illustration. Last weekend the forecast predicted rain on Saturday (i.e. yesterday). As the week progressed the forecast changed and rain wasn’t forecast until next Wednesday. Then it rained on Friday evening.

    Here’s the outlook from today:

    You can see that rain is forecast for Wednesday and Thursday, but the rainfall radar map shows why it is so difficult to predict whether rain will fall at a specific location. The rain clouds are rather small and moving rather quickly; the winds are around 25km/h (westerly). At the time of taking that screen grab there had been some light rain, but will the other blobs hit us? The Met Éireann model says “no” but others may well say “yes”. It’s a tough problem to predict this sort of thing.

    One thing that I think could be improved is a more reasonable representation of the uncertainty. The outlook for today confidently asserts that the Chance of Preciptation for the rest of today is “0%”. To me that means that it is absolutely impossible that it will rain, and that seems unreasonable to me. Surely there is some chance of rain later today? It doesn’t do much for the credibility of a forecast to claim such certainty. A week or two ago there were no clouds anywhere and “0%” was reasonable, but not today. If it were up to me I’d probably put “<1%” or “<5%” to hedge my bets.

    And then there is the question of what amount of rain we’re talking about. I was on campus on Thursday and a few spots of rain fell then. I only noticed because I was outside, coming back from lunch. That was too little to count as real rainfall, but I wonder what the threshold is?

    #MetÉireann #Rain #Weather
  5. @pvonhellermannn After a discussion last week about naming storms, I wrote to the UK Met Office suggesting that we start naming heatwaves, similar to the way we name storms.
    I got this reply

    Thank you for your email and for sharing your suggestion.

    We appreciate your idea of assigning names to significant heat events in a similar way to our named storm system. The Met Office currently names storms as part of a joint initiative with Met Éireann and KNMI to help communicate the potential impacts of high-impact weather. Heatwaves are communicated through forecasts, weather warnings where appropriate, and Heat-Health Alerts issued by the UK Health Security Agency and Met Office.
    We value public feedback on how weather information is communicated and have passed your suggestion to the relevant team for consideration.
    Thank you for taking the time to contact us.

    Kind regards,
    Service Desk

    #NamedStorms #NamedHeatwaves #UKMetOffice #MetÉireann #KNMI

  6. @pvonhellermannn After a discussion last week about naming storms, I wrote to the UK Met Office suggesting that we start naming heatwaves, similar to the way we name storms.
    I got this reply

    Thank you for your email and for sharing your suggestion.

    We appreciate your idea of assigning names to significant heat events in a similar way to our named storm system. The Met Office currently names storms as part of a joint initiative with Met Éireann and KNMI to help communicate the potential impacts of high-impact weather. Heatwaves are communicated through forecasts, weather warnings where appropriate, and Heat-Health Alerts issued by the UK Health Security Agency and Met Office.
    We value public feedback on how weather information is communicated and have passed your suggestion to the relevant team for consideration.
    Thank you for taking the time to contact us.

    Kind regards,
    Service Desk

    #NamedStorms #NamedHeatwaves #UKMetOffice #MetÉireann #KNMI

  7. A Met Éireann weather advisory for "very warm or hot" temperatures across Ireland, from overnight Tues/Weds until Thurs? You know that means weather warnings are on the way. Batten down the ice cubes, folks..

    met.ie/warnings-wednesday.html

    eta:
    This advisory originally ran until Thursday of this week - now it has been updated to run until *Tuesday week* 😦

    #Aimsir #meteireann #weather #wx #mastodaoine

  8. A Met Éireann weather advisory for "very warm or hot" temperatures across Ireland, from overnight Tues/Weds until Thurs? You know that means weather warnings are on the way. Batten down the ice cubes, folks..

    met.ie/warnings-wednesday.html

    eta:
    This advisory originally ran until Thursday of this week - now it has been updated to run until *Tuesday week* 😦

    #Aimsir #meteireann #weather #wx #mastodaoine

  9. Degrees of Heat

    Ireland is on the periphery of the “Heat Dome” which is bringing extremely high temperatures (over 40°C) to mainland Europe and parts of Britain. Temperatures on the Emerald Isle are somewhat lower, warm by Irish standards, but bearable (though it is quite humid).

    To amuse my friends and colleagues sweltering under the Heat Dome, I thought I’d share this graphic from the Met Éireann weather app:

    No doubt it will cause some amusement to see red for danger for temperatures of 25°C!

    This type of weather reminds me of the hot summer of 1976, which I remember very well, not least because of the England versus West Indies Test Series that summer. I hadn’t realized until recently that the Windies played a match against Ireland that summer too, in Rathmines. Collis King was out for 24 in the WI first innings, off 6 balls (4 4 6 4 6 out)…

    #cricket #HeatDome #MetÉireann #Weather
  10. Degrees of Heat

    Ireland is on the periphery of the “Heat Dome” which is bringing extremely high temperatures (over 40°C) to mainland Europe and parts of Britain. Temperatures on the Emerald Isle are somewhat lower, warm by Irish standards, but bearable (though it is quite humid).

    To amuse my friends and colleagues sweltering under the Heat Dome, I thought I’d share this graphic from the Met Éireann weather app:

    No doubt it will cause some amusement to see red for danger for temperatures of 25°C!

    This type of weather reminds me of the hot summer of 1976, which I remember very well, not least because of the England versus West Indies Test Series that summer. I hadn’t realized until recently that the Windies played a match against Ireland that summer too, in Rathmines. Collis King was out for 24 in the WI first innings, off 6 balls (4 4 6 4 6 out)…

    #cricket #HeatDome #MetÉireann #Weather
  11. Storm Chandra

    The Irish news today has been dominated by the arrival of Storm Chandra on these shores, accompanied by strong winds, heavy rain and widespread flooding. The whole country has been under a yellow alert, which will last until 11pm.

    The fact that it had been raining very heavily for days before the storm must have saturated the ground, which would have contributed to the flooding. Unusually, the worst of the flood has been on the East Coast, with Counties Wexford and Dublin badly hit. Usually it’s the West of Ireland that bears the brunt of storms which usually come from across the Atlantic.

    It’s been a strange day in Maynooth because, despite the storm, the weather hasn’t been too bad at all. There was a long window this morning during which it was actually quite sunny and pleasantly mild, though a bit breezy. The picture on the left shows the situation in mid-morning when the prevailing wind was southerly.

    The main mass of raincloud to the North had passed over us by then, and the small but intense strip off the Louth/Dublin coast missed Maynooth entirely. You can see a big gap. Rain was heading towards us from the South, and did reach us in the afternoon, though it wasn’t particularly severe. It remained reasonably warm throughout the day, though it is much colder now (I’m writing this at about 7.30pm).

    Dublin is only about 25km from Maynooth and it was a surprise to see major flooding, with parts of the M50 flooded for a time while we experienced nothing particularly severe. Not that I’m complaining!

    For more about Storm Chandra, including animations of its progress can be found here.

    #flooding #MetÉireann #StormChandra #Weather

  12. Not expecting anything to come of this email to Met Éireann, any more than a similar one I sent to Irish Rail over a year ago. But we live in hope. A reply from a human would be a start

    #Grok #Twitter #MetEireann #MastoDaoine #X #PublicService #SocialMedia

  13. Not expecting anything to come of this email to Met Éireann, any more than a similar one I sent to Irish Rail over a year ago. But we live in hope. A reply from a human would be a start

    #Grok #Twitter #MetEireann #MastoDaoine #X #PublicService #SocialMedia

  14. #ExtremeWeather events to become more frequent in #Ireland

    By Eithne Dodd
    Updated / Monday, 29 Dec 2025

    "2025 was the year climate scientists agreed it would be impossible to limit global warming to 1.5C above pre-industrial levels.

    "The target was agreed by world leaders back in 2015.

    "This means a certain amount of damage to the Earth's environment due to human-induced climate change is irreversible.

    "In Ireland, several reports this year found that the state of the country's environment was getting worse.

    "#MetÉireann climatologist Paul Moore explained that as Ireland warms, extreme weather events will become more frequent.

    "Mr Moore told RTÉ’s This Week that sea level rise is 'locked in', even if global warming was limited to 1.5C.

    " 'That means when we get an #ExtremeRainfall event and #HighTides or #SpringTides together, we have compound events where you get #TidalLock, you get #CoastalFlooding as well as the rainfall and not being able to run out into the sea,' he said.

    "Mr Moore added: 'So those compound events where sea level rise will come in conjunction with storms and heavy rainfall events causing more impacts.

    " 'That's something that's definitely going to increase.'

    "There has been a 0.2 metre rise in the sea level off the Irish coast between 1901 and 2018.

    "The National Climate Change Risk Assessment identified 115 risks for Ireland in a warming world, among them were coastal flooding, #erosion and #ExtremeWinds."

    Read more:
    rte.ie/news/ireland/2025/1228/

    #ClimateChange #ClimateCrisis #SeaLevelRise #ExtremeWeather #IrelandWx #ExtremeWx

  15. #ExtremeWeather events to become more frequent in #Ireland

    By Eithne Dodd
    Updated / Monday, 29 Dec 2025

    "2025 was the year climate scientists agreed it would be impossible to limit global warming to 1.5C above pre-industrial levels.

    "The target was agreed by world leaders back in 2015.

    "This means a certain amount of damage to the Earth's environment due to human-induced climate change is irreversible.

    "In Ireland, several reports this year found that the state of the country's environment was getting worse.

    "#MetÉireann climatologist Paul Moore explained that as Ireland warms, extreme weather events will become more frequent.

    "Mr Moore told RTÉ’s This Week that sea level rise is 'locked in', even if global warming was limited to 1.5C.

    " 'That means when we get an #ExtremeRainfall event and #HighTides or #SpringTides together, we have compound events where you get #TidalLock, you get #CoastalFlooding as well as the rainfall and not being able to run out into the sea,' he said.

    "Mr Moore added: 'So those compound events where sea level rise will come in conjunction with storms and heavy rainfall events causing more impacts.

    " 'That's something that's definitely going to increase.'

    "There has been a 0.2 metre rise in the sea level off the Irish coast between 1901 and 2018.

    "The National Climate Change Risk Assessment identified 115 risks for Ireland in a warming world, among them were coastal flooding, #erosion and #ExtremeWinds."

    Read more:
    rte.ie/news/ireland/2025/1228/

    #ClimateChange #ClimateCrisis #SeaLevelRise #ExtremeWeather #IrelandWx #ExtremeWx

  16. Further updates to #StormBram weather warnings from Met Éireann - with additional areas coming under an orange warning.

    met.ie/warnings-today.html

    #MastoDaoine #MetÉireann #Weather #wx

  17. Further updates to #StormBram weather warnings from Met Éireann - with additional areas coming under an orange warning.

    met.ie/warnings-today.html

    #MastoDaoine #MetÉireann #Weather #wx

  18. #StormClaudia

    🟠 Orange weather warning for rain in Dublin, Wicklow, Wexford - from 2pm on Friday, 14 November, until 11am on Saturday.

    🟡 Yellow weather warnings for rain and wind also in place - various times and locations from 9am on Friday.

    More information from Met Éireann: met.ie/warnings-today.html

    #MastoDaoine #MetÉireann #Weather #DUB #WW #WX

  19. #StormClaudia

    🟠 Orange weather warning for rain in Dublin, Wicklow, Wexford - from 2pm on Friday, 14 November, until 11am on Saturday.

    🟡 Yellow weather warnings for rain and wind also in place - various times and locations from 9am on Friday.

    More information from Met Éireann: met.ie/warnings-today.html

    #MastoDaoine #MetÉireann #Weather #DUB #WW #WX

  20. Calling all Irish weather and climate enthusiasts! 

    Just a quick post to share an opportunity to get involved in a bit of Citizen Science. The inestimable Zooniverse has teamed up with Met Éireann, the Irish National Meteorological Service, in a project called Irish Weather Rescue. Your mission, should you choose to accept it, is to help digitize historical weather records that currently only exist on paper. Currently only a few percent of the available records have been digitised.

    The project aims to provide access to valuable data that will improve our understanding of how rainfall patterns have changed over longer timescales and provide context for the changes we see in our current climate and possible future climate. Met Éireann’s archive contains an extensive collection of historical weather observations that include meteorological registers, rainfall registers, climatological reports, weather diaries, monthly weather bulletins and maps. These handwritten paper records are at risk of being lost due to the vulnerability of the original paper documents. By creating a digital copy of these records and extracting the data contained in them we can use the data to monitor climate variability and change, support effective climate risk management and improve climate model projections.

    To read more about the project and/or volunteer, see here.

    #CitizenScience #climateChange #MetÉireann #Weather #Zooniverse

  21. Sorry now: drizzle? Drizzle. Really? Drizzle? Excuse me, but this is not the high pressure weather system I ordered, Met Éireann.

    #MastoDaoine #Weather #WX #MetÉireann

  22. Sorry now: drizzle? Drizzle. Really? Drizzle? Excuse me, but this is not the high pressure weather system I ordered, Met Éireann.

    #MastoDaoine #Weather #WX #MetÉireann

  23. Amy, Violet and Wubbo: Is your name on this year’s storm list?

    The new list of storm names for the 2025 to 2026 North Atlantic season has just been released by weather experts at the Met Office, Met Éireann and the Dutch national weather forecasting service, KNMI.

    This year’s is made up entirely of suggestions submitted by the public, with around 50,000 names put forth for consideration.

    mediafaro.org/article/20250901

    #Weather #Winter #Meteorology #Storm #Atlantic #MetOffice #MetÉireann #KNMI

  24. After a two-day visit to Dublin, the only thing I want to say is this:

    I apologize in advance, but this is true: Dubliners have no right to complain about bad weather.

    They receive 750 mm of rain a year, while Galway (city) has 1,550 mm, and the Aran Islands have even more.

    #mastodaoine #dublin #galway #meteireann #irishweather

  25. After a two-day visit to Dublin, the only thing I want to say is this:

    I apologize in advance, but this is true: Dubliners have no right to complain about bad weather.

    They receive 750 mm of rain a year, while Galway (city) has 1,550 mm, and the Aran Islands have even more.

    #mastodaoine #dublin #galway #meteireann #irishweather

  26. < edit >
    Ah. Seems I was mistaken about this. 👇🏼 As you were.
    < /edit >

    Huh. #StormÉowyn and #StormEowyn give different results. Dammit.

    #MetÉireann #MastoDaoine #Weather #WX

  27. < edit >
    Ah. Seems I was mistaken about this. 👇🏼 As you were.
    < /edit >

    Huh. #StormÉowyn and #StormEowyn give different results. Dammit.

    #MetÉireann #MastoDaoine #Weather #WX

  28. I'm looking out the window now at the silhouette of a tree in the streetlight and it's utterly calm – with not so much as a tremble of a breeze to be seen – and wondering how long that's going to last.

    #StormEowyn
    #MetEireann
    #RedWeatherAlert

  29. No-one should be outdoors from midnight. If you see anyone on the streets today/tonight, contact the local authority or Gardaí.

    In Dublin, you can report rough sleepers online at:

    homelessdublin.ie/homeless/i-a

    #StormÉowyn #MetÉireann #MastoDaoine #Weather #WX

  30. No-one should be outdoors from midnight. If you see anyone on the streets today/tonight, contact the local authority or Gardaí.

    In Dublin, you can report rough sleepers online at:

    homelessdublin.ie/homeless/i-a

    #StormÉowyn #MetÉireann #MastoDaoine #Weather #WX