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Charts ( Up to T120 ) Winter 2023/2024 ** READ MOD NOTE IN FIRST POST**

  • 01-12-2023 1:19pm
    #1
    Moderators, Science, Health & Environment Moderators Posts: 16,980 Mod ✭✭✭✭Gonzo


    Mod Note


    This thread is for posting/discussing/analyzing CHARTS in the shorter range timeframe up to T120 hours (next 5 days) for Winter 2023/2024


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


    Thanks


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

    Autumn 2023 finished on a very chilly note after what was a mostly mild to warm season with plenty of rain. It is currently mostly dry across the country and very frosty so a very seasonal start to winter 2023/2024. It should remain mostly dry until mid week but showers across some coastal parts of the country cannot be ruled out and these could contain hail or sleet over the weekend, although many areas will stay dry throughout the weekend.

    Temperatures between now and Tuesday not much higher than 4 or 5C.

    From Wednesday rain and much milder air will sweep in from the west with temperatures quickly going back into double figures and it could become very windy as well.


    Not much rain over the coming 5 days other than a few showers but the rain will be gathering right at the very end of this period.


    Post edited by Gonzo on


«134

Comments

  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    Entering a more unsettled spell of weather from later Tuesday, strong frontal winds and heavy rain on Weds, quite windy in the SW and along coastal areas, blustery overland. Models beggining to show a storm on Thursday, a few of them brining very strong winds into Ireland but not all in agreement yet on track or strength so a bit to go yet but leaning towards very strong winds and heavy rain with high totals showing up especially in the SW, S, SE higher ground in the E, parts of the W.

    Edit: copied and moved post from wrong thread 😴




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    A lot of energy out in the Atlantic over the weekend, some quick moving areas of LP about, GFS and UKMO showing one packing a punch moving near or over Ireland on Sunday, will see if anything comes of it.




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    More models looking windy to very windy to stormy on Sunday, fast moving, goes past or through relatively quick. A bit to go yet to see if it holds its track and intensity but one to watch.



    UKMO in steroids theses days, usually turns down the dial closer to the event.




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    That's a stormy chart just out from ARPEGE, still a bit to go for more confidence with track and strength.




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    ECM 12OZ throwing in a stormy Saturday now, small and very fast moving systems, track is everything.




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  • This morning's UKMO HD run is fairly passive about tomorrow. Has the low further north instead of it tracking across Ulster.




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    Very fast jet and Isobars tightening over Ireland increasingly so from Weds giving a breezy to blustery day more so towards evening and getting increasingly windy through Thursday countrywide, quite strong in coastal counties especially Northern, all associated with a Storm with a very large Wind Field which is set to form and move down past the the NW of Scotland , through the North sea and into Northern Europe. Looks like it could be named, could bring very strong winds to the UK and into the likes of Holland , Denmark and Germany.

    Quite wet on Thursday, becoming increasingly cooler, chance of some wintry showers towards Fri in Northern counties, may not last long though as the weather could switch milder again.








  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    ICON has reverted from mild to cold again. ECMWF often quite similar to the ICON model so we will see what this evening's run brings. Comparison between latest run (top) and earlier run of the ICON (bottom) for lunchtime Christmas Eve. Such drastic changes from run to run.

    The GEM and the GFS are a tad colder from the 233rd to 25th but it is a glancing blow of cold rather than anything overly wintry. Wintry showers for NW and N areas perhaps.

    Overall, the fluctuations from run to run are utterly chaotic. What is consistent is a short cold snap and a raging jet stream over the north of the Ireland. This is reflected in the ensembles.

    An example of the chaos can be seen in the GEM for the past two runs. The latest run is top showing a deep low barrelling toward us whereas the 00z was not showing anything of the kind.


    Post edited by WolfeEire on

    www.x.com/wolfeeire



  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    Overall, seasonal weather this Christmas weekend into Monday is favoured but the snow risk is low away from high ground in the north. There is plenty of scope 7 days out from the Big Day for colder/milder scenarios. Ireland is very much on the edge of the cold/mild airmasses for the period.

    Gfs upgrade in the 00z in terms of cold potential for the weekend into early next week. 00z (top) compared to 18z (bottom). The mean temp would not be conducive to much wintry activity but there is a definite shift from a mild outcome. Current model output suggests Saturday into Christmas Eve the most likely time period for any colder airmass to begin impacting Ireland, lasting up to and including Christmas Day.

    ECM is a tad cooler than the 12z as the latter was compared to the previous run. Average temps for the time of year on Christmas Day are forecast. Rather 'benign' as Met Éireann might say! Either way, it's not the blowtorch that was threatened 24 hours ago.

    The Korean KMA keeps it cool/cold from Christmas Eve through to December 30th

    https://www.meteociel.fr/modeles/kmae_cartes.php?ech=12&code=0&carte=0&mode=1&archive=0

    The Navgem is all rather fleeting and remains cool from the weekend beyond

    https://www.meteociel.fr/modeles/navgeme_cartes.php?ech=6&mode=1

    Icon 850s below

    Gem has a two day cold snap with any wintry activity confined most likely to high ground and north Connacht and Ulster

    The UKMO is not dissimilar to the GEM and downgrades the cold potential on previous runs. It's all rather fleeting


    Post edited by WolfeEire on

    www.x.com/wolfeeire



  • Registered Users, Registered Users 2 Posts: 17,090 ✭✭✭✭nacho libre


    It's like a jigsaw puzzle ,but with one or two key pieces missing to complete it in trying to get proper cold here. With that Iberian high loitering all we are ever going to get is short term cold shots, there will always be enough shortwave energy out in the Atlantic to lock the high in and stop it migrating north or linking up with heights elsewhere. A cold North America is bad news for us, but a mild North America doesn't help much either. When do Met Eireann release their January long range forecast?



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  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    Week 3 (Monday 01 January to Sunday 07 January)

    Early indications are that the first week of 2024 will be rather unsettled with a mobile Atlantic regime pushing in showers and bands of precipitation at times. Precipitation totals are expected to be above normal nationwide. Mean air temperatures for the 7-day period are expected to be above normal but that does not preclude the chance of some colder incursions at times.

     

    Week 4 (Monday 08 January to Sunday 14 January)

    At Forecast Week 4, there is a weak trend towards a predominant northwest air-flow over Ireland. Precipitation totals are forecast to be slightly above normal whilst mean air temperatures will be close to or slightly above the January average.

     

    ­­­­SEASONAL OUTLOOK FOR JANUARY, FEBRUARY AND MARCH 2024 (JFM)

    The signal from the C3S seasonal models for Ireland during the JFM period is for average to slightly above average temperatures. Rainfall is likely to be close to average.

    While mean temperatures during JFM are signalled to be approximately average overall, there is a high chance of cold outbreaks from the north and northeast over the three month period, leading to below average temperatures at times.

    The rainfall forecast is less certain, with the potential for wetter and drier spells within the three months leading to near average rainfall.

    The sea surface temperatures around Irish coasts and over the Atlantic are expected to continue slightly above average during JFM, trending 0.2 to 0.5°C degrees higher than normal generally.

    www.x.com/wolfeeire



  • Registered Users, Registered Users 2 Posts: 17,090 ✭✭✭✭nacho libre


    Thanks for that WolfeEire. So some short polar maritime incursion for the first week of January. Hopefully temperatures will below average at time rather than normal or slightly above. It's very encouraging they mention a high chance of colder outbreak at this early stage, usually they'd be very cautious/ reserved.



  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    UKMO likewise @nacho libre

    Monday 1 Jan - Monday 15 Jan

    Most likely continuing unsettled with bands of rain crossing the UK with brighter conditions and showers in between. The wettest and windiest conditions are most likely in the north and west. Short-lived colder spells remain possible, with hazards such as snow and ice, particularly in the north. The chance of these colder spells slightly increases moving through January, with a low likelihood of a more prolonged spell of cold weather developing around mid-month.

    www.x.com/wolfeeire



  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    ^^^^^^^^^^^^^^^^^^^^^^^^

    Think the few posts above are in the wrong thread, meant to be in the +120hrs FI thread I'm sure.



  • Registered Users, Registered Users 2 Posts: 17,090 ✭✭✭✭nacho libre




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58




  • Moderators, Science, Health & Environment Moderators Posts: 16,980 Mod ✭✭✭✭Gonzo


    It's very disheartening isn't it, the ridiculous complex set of ingredients that need to be all aligned at the right time in the right place for us to have a chance of proper cold and snow. Ireland has to be up their in one of the toughest places in the northern hemisphere this far north to get snow, it's no wonder we end up in a bust or model wobble land most of the time.



  • Registered Users, Registered Users 2 Posts: 1,579 ✭✭✭Billcarson


    With climate change in the mix it makes it all the more difficult. Now more then ever everything has to be so perfectly aligned.



  • Registered Users Posts: 1,053 ✭✭✭Neddyusa




  • Registered Users, Registered Users 2 Posts: 6,339 ✭✭✭highdef


    Thanks for the excellent news and seasons greetings to you. I'll gladly take a warm turd over ice and snow, making it dangerous for the huge amounts of people who will be travelling over the Christmas period, by road and by foot.

    Imagine being stuck at home for Christmas, melting snow for water as your pipes are frozen and being unable to travel to loved ones as the roads are trecharous due to snow and ice.

    As much as I love a good snowfall, the negative impacts of it at Christmas far outweigh the positives.



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  • Moderators, Science, Health & Environment Moderators Posts: 16,980 Mod ✭✭✭✭Gonzo


    We do seem nailed on now for a flat as a pancake relatively mild Atlantic Christmas period and all the uncertainty is now gone. This mild weather looks like it could last into the beginning of New Year as well. Next we wait for something to happen in January, hopefully we will start to see changes to something more interesting develop in the models next week.



  • Registered Users Posts: 105 ✭✭zisdead


    You couldn't rule a line as straight for an Atlantic dominated west / east flow for Christmas eve on the GFS



  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    The Azores High is dictating all but I do not think the forecast is locked in yet. Based on current output, Christmas Day will not be dissimilar today if not a degree or two cooler. I would say with 6 days to go until Christmas Day there will be further changes in the positioning of that high. Its northerly position is being forced by two shortwaves emanating from its southwest and the troughing activity over Scandinavia. If the projected development of those three systems alters over the next days then so will the position of the high. We are on the border of two different airmasses so we could end up going much milder or much cooler.


    www.x.com/wolfeeire



  • Moderators, Science, Health & Environment Moderators Posts: 16,980 Mod ✭✭✭✭Gonzo


    Unfortunately this is the default setup for us almost every Christmas. Even in the 80s when we got generally much colder winters compared to now the wait for snow was nearly always after Christmas. Snow is more likely to fall in Ireland in April than it is in December etc etc. All hopes now pinned for January and February when cold spells can drag in the coldest upper air temperatures if we can get a direct hit unstable northerly or easterly. The prime time for cold spells in Irish winters is generally last week of December to about the middle of February. After valentines day the days start to become noticeably longer in the evenings and sun considerably stronger so snow melt quickly becomes more of an issue as we push on towards March. We can still get very cold weather in the first half of March but by this point snow melt/dripping will always be an issue even if the daytime air temperatures are around 0C. We had proof of this during Storm Emma where there was always dripping.



  • Registered Users, Registered Users 2 Posts: 9,807 ✭✭✭squonk


    Dull and uneventful is fine. Lots will be travelling, lots will be away from their regular homes and many will be socialising so the absence of snow, ice, rain or wind is actually a good thing.



  • Registered Users, Registered Users 2 Posts: 2,107 ✭✭✭squarecircles


    hu-ho NOW, therell be plenty of bland rain, dont you worry, plenty more bland uneventful rain will be falling.

    That you can be assured of.



  • Registered Users, Registered Users 2 Posts: 7,216 ✭✭✭pauldry


    Ya seems pretty uneventful for all Christmas. Just meh. But there might be hailstones Xmas eve.



  • Registered Users Posts: 1,940 ✭✭✭adocholiday


    I feel like Wicklow could go to an orange level wind warning tomorrow. The centre of the storm is passing into Sweden but the wind field is very significant with this one.

    I assume it's a combination of the wind direction and Wicklow mountain orientation but the winds are looking much stronger here than anywhere else in the country. Looking at Met Eireann's hourly forecast it's showing stronger mean speeds and gusts than any recent storm we've had. All of the high res models showing widespread orange level gusts in the county tomorrow, and HARMONIE showing orange level mean wind speed too.




  • Registered Users Posts: 273 ✭✭ascophyllum


    Are those maps just a function of altitude? You regularly see them showing small blobs of 120+ just over the mountains in Kerry and Connemara when it's really just 90-100 at sea level.



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  • Registered Users Posts: 1,940 ✭✭✭adocholiday


    Usually that's the case yes, the ICON chart there would reflect the terrain layout in Wicklow. However anything more eastward than that generally is more sheltered. In this case we're seeing an enhancement of the wind on the eastern side, which is generally unusual.



  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    Very big seas off Atlantic coasts with strong onshore breezes associated with now named Storm Pia . Prolonged strong winds over land from later Weds through much of Thurs. Rain not a huge issue but probably a good runoff from higher terrain in the W, NW and N and a few inland elevated areas.

    Relatively mild at around 10 or 11C during Thurs.






  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    That Dec 27th still showing up. This the latest from the GFS


    www.x.com/wolfeeire



  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    Some very big rainfall totals for the 24hrs into Weds afternoon and a lot of it will have fallen overnight into early morning so spot flooding a risk.

    More counties could be added to the rainfall warnings. Becoming breezy to windy across the country later Tues into Weds, quite windy along W, NW, N, NE and later into the SW, S, SE and E coastal areas.

    Weds evening set to become very windy or even stormy in the SW or W or both and along S, SE, W coasts and very strong winds overland into Thurs and only slowly moderating , remaining blustery in the Northern half of the country into the evening/ night . Would expect warnings, mostly yellow and possibly close to Orange in the SW or W or both.

    After the frontal rains go through on Weds turning more convective in nature with hail and thunderstorms possible especially along Atlantic counties as we are under a very cold upper pool, some moving inland and squally in nature. Some sleet showers also in the mix. A lot of vorticity and shear in the atmosphere... wonder will we hear of any funnels or Tornadoes.

    Turning cooler then of late and more so given the windchill effect. A much rougher passage of weather then of late with strong winds, high rainfall and cold temperatures.

    Very high sea states, want to keep an eye on those high tides on Weds and Thurs ( Spring tides ) along the Atlantic Seaboard, especially Thurs with all the run off from the heavy rain into Weds especially around the SW, S coasts.







  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    Met Eireann updating rainfall warnings.






  • Registered Users, Registered Users 2 Posts: 5,975 ✭✭✭Storm 10


    At last something stirring to keep us interested it was so quite the last few days but now it looks like we could see a couple of interesting days of weather. Thanks to all the posters here who keep us in the weather loop of coming events.



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  • Registered Users Posts: 430 ✭✭Donegal Ken


    The Ecmwf and Gfs models showing the risk of a band of rain moving northwards on later Friday night into Saturday morning bumping into colder air across the west, northwest and north and turning to snow for places. This needs to be watched and potentially could give the first real snowfall of the winter season. Some higher resolution models also showing this.




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    A bit to go yet with Saturdays system. Deepening on approach but so far keeping the strongest winds to coastal areas in the W, SW, S, SE and blustery overland. Very wet again along the W and SW and could see some wintry falls in the NW, N and on elevated ground in the W and maybe a few more spots.










  • Registered Users, Registered Users 2 Posts: 15,489 ✭✭✭✭Supercell


    Fax chart for Saturday evening looks rough, especially out west. The atlantic well and truly in control.


    Have a weather station?, why not join the Ireland Weather Network - http://irelandweather.eu/



  • Registered Users Posts: 1,396 ✭✭✭esposito


    I’m a glass half empty person this morning. I am so fed up with all this relentless wind and rain as I’m sure many on this forum are.

    I fear the Atlantic will still be in control well into January despite all these background signals for colder weather. Hope to god I am wrong!



  • Registered Users, Registered Users 2 Posts: 17,090 ✭✭✭✭nacho libre


    Unfortunately looking at some of the output this morning you maybe right. The post 120 hour thread has gone quiet. I think we will still get a ssw and a cold spell at some point during the winter, but I am less confident of one in january now



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  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    The large system on Saturday showing different tracks on the main models but currently does not look to produce storm force winds on land, not as tight isobars, looks worse than what it will probably produce. Relatively slow moving but the position of the center crossing the country keeps the strongest winds offshore. Windy certainly around the coastal areas may warrant yellow warnings, maybe orange sea area warnings.

    Some models showing the initial front to cross the country early Saturday as brining heavy rain and blustery conditions. A lot of rain to come between here and Sunday with Atlantic coastal counties getting the most.

    Parameters present for Thunderstorm activity on Saturday following the front in the more unstable airmass but mostly around the coasts over water, CAPE is not huge but plenty of LLS and DLS with decent Lapse rates at times, will see if a few migrate further inland. A lot of Vorticity in the system and very cold uppers all aiding convection. Perhaps more opportunities for Tornadoes but as ever relatively low chance, squally showers with downdraughts and hail showers possible, sleety on higher ground.

    Wintry further North Fri into Saturday. Could be a fair dump of wet sleet to snow on Saturday in the NW, N and high ground in the W perhaps as the front meets the colder airmass. Still windy on Sunday with showers mainly along Atlantic coastal areas. Looks a lot drier and calmer for Bank Holiday Monday at present.











  • Registered Users, Registered Users 2 Posts: 15,489 ✭✭✭✭Supercell


    Don't like the look of this at all, flooding I'd imagine is going to be a problem. We've had sustained high winds for a while now , so would imagine anything likely to be blown over already has been so hopefully wind, though strong enough, likely isn't going to be the main factor here. The ground here is totally sodden, nearby "Kilbogget Park" is already flooding in places i've rarely seen before.


    Have a weather station?, why not join the Ireland Weather Network - http://irelandweather.eu/



  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58


    Quite windy in the SW tomorrow. Plenty of showers and rain along the coasts, a few hail showers too possible







  • Registered Users, Registered Users 2 Posts: 3,169 ✭✭✭Rebelbrowser


    A lot of excitement now in other threads for the potential for some real cold from ca. 15 January onwards, but in the shorter term there is a bit of an easterly with cold uppers from this Sunday with some chance of white gold falling from streamers (i.e, for the uninitiated, showers of snow that develop over the Irish sea from the interaction between sufficiently cold air and the warmer sea below). That said, the latest GFS at 6z doesn't support any snow unfortunately....




  • Moderators, Science, Health & Environment Moderators Posts: 12,136 Mod ✭✭✭✭Meteorite58



    Hp becoming dominant, slack airs, very low levels of precipitation, fog over the weekend especially Sunday morning and again possibly Sun night. Widespread frosts becoming a feature and getting colder as the days go on, low temperatures during the day, freezing early at night especially from Sunday could see freezing before or just after dark from Monday. Good sunshine levels Fri, Sat and for a good part of the country on Sunday , foggy conditions might be slow to clear and lift in parts of the Southern half of the country. GFS is a bit less cold as the week goes on but remains frosty at night, ECM keeps it very cold and sees some days struggling to get up a few degrees in places with widespread hard frosts.











  • Registered Users, Registered Users 2 Posts: 15,489 ✭✭✭✭Supercell


    Lovely calm,cool spell coming up, doesn't look like much wintry precipitation but I don't mind that after the autumn and December we just had. By Monday it looks likely that there will be a chilly breeze on the east and south east coasts with perhaps some snizzle and low cloud, too early to call much details on that though. I'll take what's on offer below any day :)


    Have a weather station?, why not join the Ireland Weather Network - http://irelandweather.eu/



  • Registered Users, Registered Users 2 Posts: 3,169 ✭✭✭Rebelbrowser


    There looks to be some chance on present charts for snow showers in the South / South East on Tuesday. No accumulations likely but a reasonable chance of seeing falling snow. Will post charts tomorrow evening as the Hi Res models begin to cover the relevant period and if this is still a runner then



  • Registered Users, Registered Users 2 Posts: 954 ✭✭✭WolfeEire
    Clare (410ft asl)


    Based on the UKMO and GFS, there is a great chance of somewhere in Ireland places seeing snow Monday night into Tuesday


    www.x.com/wolfeeire



  • Registered Users, Registered Users 2 Posts: 3,169 ✭✭✭Rebelbrowser


    All in all, today's output has made snow this Tuesday less likely, but just looking at tonight's Aperge there is definitely still interest for the South....




  • Registered Users, Registered Users 2 Posts: 286 ✭✭almostthere12


    Ukmo still going for snow over parts of Cork and Waterford




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