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FI Charts ( T120+ onwards) Winter 2022/2023 **READ MOD NOTE IN FIRST POST**

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Comments

  • Registered Users, Registered Users 2 Posts: 644 ✭✭✭glightning



    Sounds about right to me. All I can say is, that I should have been born in the US. I love hot sauce and proper weather.



  • Moderators, Science, Health & Environment Moderators Posts: 17,578 Mod ✭✭✭✭Gonzo


    The AO is showing signs of very quickly moving from deeply negative to neutral or slightly positive by the start of January.

    Untitled Image

    NAO is now neutral but will move into positive phase from now and lasting into first week of January at the very least.

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    Blocking is likely to be highly reduced in the coming 7 to 14 days with the zonal westerlies ruling the roost over the next fortnight with the Atlantic most likely stepping on the gas for a while.



  • Registered Users, Registered Users 2 Posts: 17,751 ✭✭✭✭nacho libre


    The MJO event in November which led to our recent cold spell gives a good idea of the lag time involved.Unfortunately this event may not be quite as good, but hopefully it will lead to blocking in the right place. Then you will see the AO go negative again. The wording of the UK Met Office updates gives me some confidence that we will see another cold spell during January. In the event we don't get a block towards the second week of January, if we manage to get a resurgent jet running on a North West to South East tilt, we could, with all the very cold air locked up to the north, still tap into some potent polar maritime airflows at times during January. It won't lead to a deep freeze or copious amounts of snow, but decent accumulations are possible in places , however brief in this scenario.



  • Registered Users, Registered Users 2 Posts: 14,012 ✭✭✭✭sryanbruen


    The complicating factor again will be the strong SPV. Provided the coupling happens, it is not likely we'll get a block at a high enough latitude to maximise cold air advection. The atmosphere will have a lot of fighting going on as to what it wants to achieve 😅

    Photography site - https://sryanbruenphoto.com/



  • Moderators, Science, Health & Environment Moderators Posts: 12,806 Mod ✭✭✭✭Meteorite58


    Models starting to definitely show the Atlantic stirring awake with a train of LP's and frontal rains coming in from the SW, W for the foreseeable future.

    ECM at this stage showing stronger winds than the GFS at times but overall looks like plenty of wet and blustery spells. Both main models showing very high rainfall accumulations especially along Atlantic coastal counties. The cold spell around Christmas has shrunk now to a cold blip 😀. Temps set to rise again quickly with approaching weather around midweek, currently showing some cooler days with frosty nights in places towards the end of next week and could see a sharp increase in milder temperatures again dragged in by further systems from the SW around the 1st Jan or thereabouts.

    3 systems currently to watch out for and see if they develop into much are around next Tues, Weds and Sat/ Sun. Around the Christmas season can produce it's fair share of storms some years.

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  • Registered Users, Registered Users 2 Posts: 17,751 ✭✭✭✭nacho libre


    I just wonder is the UK Met in house model, Glosea, factoring in that a coupling will not take place or be brief, seeing as they are indicating a colder turn is possible by Mid January. Or maybe they envisage that rare scenario of a Scandi high developing despite a strong vortex over Greenland that played out in February 1991. I suppose it has to happen again at some stage! Did that deliver much in the way of snow for the East of Ireland?



  • Registered Users, Registered Users 2 Posts: 14,012 ✭✭✭✭sryanbruen


    RTÉ have an archived broadcast from it here: https://www.rte.ie/archives/2021/0118/1190407-big-freeze-set-to-continue/.

    The only snow measurement I have from the event is 10cm depth at Dublin Airport. Naas got down to -13C. So a very good wintry event really, if not quite on par with what southeast England had.

    I've shared this photo before from the New Howth Photos FB group of a snow covered Howth on 10th February 1991. Even Ireland's Eye and Lambay Island out at sea got a very decent covering.

    image.png


    Photography site - https://sryanbruenphoto.com/



  • Registered Users, Registered Users 2 Posts: 1,528 ✭✭✭Hooter23


    Since the cold blast is north america is going to be "historic" and has had the effect of blasting to jet stream our way next week...could this mean the storms that come with it could be much worse than usual...im sure we are well overdue a historic wind storm by now...

    December and especially around christmas time and the new year seem to be bad time time to get storms in this country always worse than usual



  • Registered Users, Registered Users 2 Posts: 6,242 ✭✭✭Oneiric 3


    On average, there a two hyper cyclonic periods in an average Irish winter. One is around this time that runs into early January, and the next is around the upper mid period of February.

    New Moon



  • Moderators, Science, Health & Environment Moderators Posts: 1,602 Mod ✭✭✭✭WolfeEire
    Clare (430ft asl)


    Gefs and EPS surface temp charts are looking well above average for Europe into the start of January.

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    www.weatheire.com



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  • Registered Users, Registered Users 2 Posts: 2,965 ✭✭✭.Donegal.


    Last storm I remember around Christmas time was about 7 years ago but I think it was standard enough.

    Late 90s produced some big ones for us and Europe. 24/12/1997 highest gust 162km/h Valentia. 26/12/1998 - 178km/h Malin head.

    Europe 25-27th/12/1999 Storm Lothar killed 110. 88 of those in France.

    Day after Storm Martin 26-28th/12/1999 killed a further 30 across Europe.



  • Registered Users, Registered Users 2 Posts: 1,528 ✭✭✭Hooter23


    Not much action in the atlantic on the latest charts..unless the stormy weather for next week shows up again later on...

    Post edited by Hooter23 on


  • Registered Users, Registered Users 2 Posts: 6,242 ✭✭✭Oneiric 3


    While no great cold on offer on the charts, there is no great warmth either over the next couple of weeks.

    Untitled Image

    Wet sunshine and the odd shower blowing in off the Atlantic seems to be the general theme for the foreseeable. Don't have the stats but 2022 has to go down as being one of the sunniest years on record.

    New Moon



  • Moderators, Science, Health & Environment Moderators Posts: 17,578 Mod ✭✭✭✭Gonzo


    Just after watching Mark Vogan's latest weather video and it is very sobering stuff if you like cold weather. Basically he is predicting a major pattern change incoming where the cold in America will get kicked into the Atlantic very quickly by a very strong arm from the jetstream stretching from Asia right across the Pacific. This will in turn move across America and connect back to our part of the jetstream, which could end up stretching right across the entire northern hemisphere. This will bottle any cold right up back into the artic and the mid latitudes turn much milder across the world, not just Europe and North America but Asia too. This could take up the first half of January and after that who knows. This isn't curtains for winter or anything but just don't be expecting a significant cold spell between now and the 1st week of January.



  • Registered Users, Registered Users 2 Posts: 6,242 ✭✭✭Oneiric 3


    What I don't like about the upcoming pattern is that while not deeply cold, it still will be consistently chilly, and that sort of wet chill that gets into the house and stays. In terms of snow, its cold, but not cold enough, but in terms of hugely exploitative heating and electricity prices go, it is still going to bite. What we are being offered on the charts is the very worst of all worlds.

    New Moon



  • Moderators, Science, Health & Environment Moderators Posts: 17,578 Mod ✭✭✭✭Gonzo


    Charts over the next 2 weeks looking incredibly wet with deluge conditions. Despite the fact that it will be mild, lots of wind and rain will make it feel rather chilly at times. Over 200mm of rain for some western areas predicted to fall between now and the end of the 1st week of January with most areas seeing at least 100mm of rainfall.

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  • Registered Users, Registered Users 2 Posts: 1,528 ✭✭✭Hooter23


    I still expect plenty of cold this winter despite some forecasts..milder possibly stormy weather in between like next week followed by freezes..



  • Posts: 4,896 ✭✭✭ [Deleted User]


    Fairly serious cold spell in Eastern North America over the next few days. How much will this affect our weather I wonder?

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  • Registered Users, Registered Users 2 Posts: 1,560 ✭✭✭esposito


    Hopefully minimal impact on us. Don’t want storms over Christmas.



  • Registered Users, Registered Users 2 Posts: 1,074 ✭✭✭sicknotexi


    Is there an upgrade on our chances to see some sneachta Christmas Day on the GFS today? Control looks promising.



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  • Registered Users, Registered Users 2 Posts: 7,514 ✭✭✭pauldry


    It does doesn't it. The actual run suggests temperatures of 2 or 3c Christmas night with some sleet possible inland. Mountains in the North will be white and there may be some night snow in some rural spots. With marginal temperatures the snow chances needs a light wind. It presently doesn't look too strong on the night of the 25th away from North Ulster but if that gale moves south it quashes the chances of snow.



  • Registered Users, Registered Users 2 Posts: 2,965 ✭✭✭.Donegal.


    More than likely another phantom snow event from the gfs

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  • Moderators, Science, Health & Environment Moderators Posts: 17,578 Mod ✭✭✭✭Gonzo


    GFS 00z shows an incredibly mild trend for the first week of January, this may also extend into the second week of January with temperatures in double figures widely across the country and much of Europe too. We could well be back on the well above normal temperatures weather pattern which took a slight pause during December. Are we setting up yet another very mild January here I wonder.

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  • Registered Users, Registered Users 2 Posts: 2,418 ✭✭✭mcburns07


    Unlikely to verify tbf



  • Registered Users, Registered Users 2 Posts: 392 ✭✭almostthere12


    Looks interesting for mid-January with blocking as the main theme (1st chart), it looks like it called the blocking as well for the cold spell in early Dec (2nd chart)

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  • Registered Users, Registered Users 2 Posts: 17,751 ✭✭✭✭nacho libre


    I would not take as gospel what the GFS is showing considering how poorly it has performed just before and after the upgrade. That said no model is showing a deep freeze anytime soon. So if the MJO phase does work in our favour, we probably are looking towards the 2nd week of January at the earliest for a colder turn.



  • Moderators, Science, Health & Environment Moderators Posts: 12,806 Mod ✭✭✭✭Meteorite58


    Still seeing plenty of LP activity from the models giving some windy spells over the Christmas period. On the cusp of +120hrs Weds looking like a windy day for much of the country, currently showing it quite windy in W, NW coastal counties with some heavy frontal rain and wintry showers to follow. Lots of heavy frontal rain showing up at times maintaining the high rainfall projections especially along Atlantic coastal counties.


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  • Moderators, Science, Health & Environment Moderators Posts: 17,578 Mod ✭✭✭✭Gonzo


    Hopefully we will start to see signs in the models around 1st week of January of something colder. I think week 3 or 4 of January would be perfect timing for a significant cold spell if it was to happen. This is also the critical time in winter where we start to think about the clock ticking.



  • Registered Users, Registered Users 2 Posts: 17,751 ✭✭✭✭nacho libre


    I agree, snow is good at anytime, but a freeze in the heart of winter is better if you like to see records challenged. The ideal scenario would be several days with extensive snow fields under a cold surface high before the sun starts to get stronger. As good as the cold was in late February 2018, even with the freezing temperatures snow still melted during the day.



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  • Registered Users, Registered Users 2 Posts: 6,242 ✭✭✭Oneiric 3


    The snow in 2018 didn't melt. It literally just disappeared

    New Moon



This discussion has been closed.
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