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FI Charts ( T120+ onwards) Autumn 2025 **READ MOD NOTE IN FIRST

  • 31-08-2025 06:38PM
    #1
    Moderators, Science, Health & Environment Moderators Posts: 17,804 Mod ✭✭✭✭


    Mod Note:

    This thread is for posting/discussing/analyzing FI CHARTS ONLY i.e. Charts in the unreliable time frame, generally +T120 onward for Autumn 2025.

    If your post does not specifically relate to an FI chart then it doesn't belong here - Off topic posts will be moved

    Thanks

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    ----------------------------------------------------------------------------------------------------------------------

    I hope this is not my final time to open a new season thread here on boards as the cutoff date ends before we step into Winter. Summer 2025 was generally warm to very warm, however as we all know this warmth ended a week ago with a significant pattern change back to the form horse with a very unsettled Atlantic setup. The next 7 to 10 days looks unsettled to say the least with low pressure either over us or close by most days with showers or longer outbreaks of rain.

    Looking into FI the GFS 12z shows a nice ridge developing around mid month but a big dumpload of salt with this as it is very far away and an unsettled September from start to finish could easily happen this year.

    Unsettled all the way to September 12th, then on the 13th we see a ridge building from the Azores.

    image.png

    By the 16th this ridge firmly over Ireland which could deliver finally some settled conditions after a very unsettled couple of weeks but do we believe it!.

    image.png

    The GFS 6z ensemble run paints a very unsettled and cool period coming up with not much support for September warmth or settled conditions. This is the most unsettled ensemble run I've seen since Winter 2024/2025, not what we want to see.

    image.png

    My main wish is not weather related but for Boards to survive and make it past the autumn into the Winter season of 2025/2026 and well beyond.



Comments

  • Moderators, Science, Health & Environment Moderators Posts: 17,804 Mod ✭✭✭✭Gonzo


    No change in the current modeling for first half of September, big rainfall spikes for tomorrow so a very wet day tomorrow followed a pet day on Thursday and after that looks wet with plenty of rain or showers around most days, also looks fairly cool with temperatures generally below average over the coming 2 weeks. Not seeing much wiggle room here for high pressure and one last blast of summer warmth.

    Untitled Image

    Maybe hints of a dryer trend from mid month.

    ECM no different either, perhaps even wetter than the GFS with no drying trend mid month.

    image.png

    An Atlantic dominated September looks very likely this year. Anyone looking for late summer warmth is better off booking a holiday to the Mediterranean than waiting and hoping for charts to flip to a settled outlook over Ireland.



  • Registered Users, Registered Users 2 Posts: 6,350 ✭✭✭Elmer Blooker


    September is generally a fine month and often better than August but not this year, it’s not a month that’s normally dominated by low pressure. We seem to be stuck in this pattern and I doubt if there’s any way out for the foreseeable … autumn here we come!
    I normally give summer a chance up to the equinox but …..

    68BA2B5C-0F7C-46AE-BF60-D859827E1F35.gif


  • Registered Users, Registered Users 2, Paid Member Posts: 14,225 ✭✭✭✭sryanbruen


    I wonder if we'll get some kind of settled period, brief or not, later. There's very few Septembers I can think of without one. Even September 2008 which was one of the more poor this century had a predominantly settled second half.

    image.png

    This doesn't look that different to the above.

    image.png

    Photography site - https://sryanbruenphoto.com/



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  • Registered Users, Registered Users 2 Posts: 2,918 ✭✭✭sparrowcar


    Looking very stormy next Mon 8th, wind gusts of 90kph in Dublin region possible.



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  • Registered Users, Registered Users 2 Posts: 3,779 ✭✭✭Dazler97


    Possible storm on Monday going by models but still a few days out yet to change , yellow and Possible orange warnings at a guess but we'll see anyway



  • Registered Users, Registered Users 2 Posts: 386 ✭✭Ros4Sam24


    Haven’t looked at the models in a while but my god what a load of 💩. Anyone jetting off this month has played a blinder…

    IMG_0872.jpeg


  • Moderators, Science, Health & Environment Moderators Posts: 17,804 Mod ✭✭✭✭Gonzo


    September 2025 shaping up to be quite the turd although we are only 4 days into the month, I don't think it's as overly wet as September 2022 was when the summer flushed on September 2nd 2022. This time around we've had it poor since about August 25th and it feels like it's been poor for a couple of weeks already.



  • Registered Users, Registered Users 2 Posts: 71 ✭✭westeast


    Sorry for hijack thead what middle to end of next week like going cutting silage in south east you can move or delete thread sorry for inconvenience



  • Moderators, Science, Health & Environment Moderators Posts: 17,804 Mod ✭✭✭✭Gonzo


    All next week is looking low pressure dominated, rain every single day and potentially stormy at times as well and temperatures generally several degrees below average. This very unsettled pattern goes right out to the end of FI at +384 hours. We're now paying the price for Spring and much of summer.



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  • Registered Users, Registered Users 2 Posts: 71 ✭✭westeast




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