The Weather Outlook

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Quantum
12 February 2025 15:19:30

Is there anyone who believes the very isolated EC solution for the medium range, the same EC that last night delivered the most outrageous cold outlier in NWP history, and is going against the majority of the other outputs (barring the JMA and the famous NASA model), has any more than a 5% chance of verifying?

Asking for a friend.

Originally Posted by: nsrobins 

I'm suprised people are calling that EC solution isolated, it honestly wasn't; its just that the GFS and UKMO were against it; but when you include all the models the colder solution had more people in it!

In any case the scale definitely seems to be shifting now. ICON12Z brings the cold air even closer and is now going for a snow/freezing rain/graupel event across central parts on Saturday.


25/26 (850hpa temp) 11 days snow/sleet falling

18/11 (-4) 19/11 (-6) 20/11 (-6) 01/01 (-7) 04/01 (-10) 10/01 (-7) 11/01 (-3) 30/01 (-1) 13/02 (-6) 15/02 (-4) 18/02 (-6)

24/25 10d

18/11 (-6) 19/11 (-6) 23/11 (-2) 22/12 (-5) 04/01 (-5) 05/01 (0)14/02 (0) 15/02 (0)12/03 (-6) 13/03 (-6)

23/24 8d

29/11 (-6) 30/11 (-6) 02/12 (-5) 03/12 (-5) 04/12 (-3) 16/01 (-3) 18/01 (-8)08/02 (-5)

22/23 7d

18/12 (-1)06/03 (-6) 08/03 (-8) 09/03 (-6) 10/03 (-8) 11/03 (-5) 14/03 (-6)

21/22 12d

fairweather
12 February 2025 15:22:20
The main thing I'd like to see in the M.O is the sun! Not really that bothered if it is bitterly cold or mild so long as we get rid of this endless grey, chilly, damp weather. The last month has seen just 5 days with over 4hrs of sun (Southend data). The winter as a whole so far 19 days with just 2 in December.
S.Essex, 42m ASL
fairweather
12 February 2025 15:24:43

Continuing trend: General rising of 850’s in both major suites - suffice to say winter is almost over and we can look forward to turning the heating off in the weeks to come. 

‘Surface’ cold not much use in Feb these days anyway. 

Sheesh, if it’d been 30 years ago we’d all be buried in 18” drifts by now… grumble grumble.. 

Originally Posted by: White Meadows 

18"? Never used to count it till it got to 3ft back then!😂


S.Essex, 42m ASL
ballamar
12 February 2025 15:40:43
Almost a Scandi high on ICON
squish
12 February 2025 16:11:07
Ukmo +120….trending back towards colder outcome ?
D.E.W on Dartmoor. 300m asl
warrenb
12 February 2025 16:13:17
I can see why the professionals are sitting on the fence at the moment, marked shift in the 12z in the short term. Longer term may not matter, but we shall see
ballamar
12 February 2025 16:25:55
Guess we might have to have a glance at how cold Scandi is in the near future to what might be heading our way. It’s possible
Retron
12 February 2025 16:28:42
No surprise really to see all the 12z so far, aside from GFS, now have a marked easterly component still at 144.

We have, after all, just seen a classic easterly setup synoptically, complete with a 1050hPa high over Scandinavia and retrogression to Greenland, with heights remaining to the northeast. We've also seen an upper low over the Channel bringing instability and precipitation. Historically those blocks tend to last for longer than first modelled, and this seems to be no exception.

It's just been our damned bad luck that temperatures have been a few degrees too warm - and yes, it'd still have been too warm for most of us in the 80s!

At least with winds coming from the east or SE the cloud should, in theory, start to break in the south at least. The North Sea is injecting plenty of moisture into the mix at the moment, hence all the cloud.


Leysdown, north Kent
squish
12 February 2025 16:36:59
Gfs trying another way to get all that cold air to us ! 
D.E.W on Dartmoor. 300m asl
Taylor1740
12 February 2025 16:39:54

No surprise really to see all the 12z so far, aside from GFS, now have a marked easterly component still at 144.

We have, after all, just seen a classic easterly setup synoptically, complete with a 1050hPa high over Scandinavia and retrogression to Greenland, with heights remaining to the northeast. We've also seen an upper low over the Channel bringing instability and precipitation. Historically those blocks tend to last for longer than first modelled, and this seems to be no exception.

It's just been our damned bad luck that temperatures have been a few degrees too warm - and yes, it'd still have been too warm for most of us in the 80s!

At least with winds coming from the east or SE the cloud should, in theory, start to break in the south at least. The North Sea is injecting plenty of moisture into the mix at the moment, hence all the cloud.

Originally Posted by: Retron 

What's the main reason then that this Easterly has been too warm? Surely it must be a consequence of how warm the continent has been this Winter and in the 80s it would have got the job done I would have thought?


NW Leeds - 150m amsl
doctormog
12 February 2025 16:47:13
Summary: More easterly muck still seems probable. 😛
12 February 2025 16:49:37
Please let it be over now.


Berkshire
Retron
12 February 2025 16:57:18

What's the main reason then that this Easterly has been too warm? Surely it must be a consequence of how warm the continent has been this Winter and in the 80s it would have got the job done I would have thought?

Originally Posted by: Taylor1740 

There's been around 1C to 1.2C of warming since the 1980s (1.5 since 61-90 as a whole) down here. It increases more as you go east - it's 1.8 for Moscow in February. The main problem was that there was too much warm air in place to start with across Europe, exacerbated by the way it started with the high migrating NE'wards rather than the traditional extention of the Siberian High moving westwards - this one was a displaced Azores High essentially. Now it *is* possible for such a spell to evolve into a really cold, snowy spell - it's happened in the past - but it takes longer to get going, as the cold air takes longer to get dragged westwards.

In the 80s we'd just have had cold rain at 2.5C here rather than slightly less cold rain at 4C. It would have been the "second bite" which would have brought the snow, as shown by the deep cold air which until very recently was still appearing in some of the ensembles. It still looks likely to get as far as Germany, for example.

While that deep cold for us is now very much an outside option - but, note, can't be ruled out entirely - I'm hopeful we'll get enough of a Continental influence to bring in lower dewpoint air and with it, more in the way of sunshine. "Faux cold" it may be, but it'll be far more pleasant than the gloom we have at the moment.


Leysdown, north Kent
Taylor1740
12 February 2025 17:01:26

Please let it be over now.

Originally Posted by: The Dub Version 

Agreed! Just checked the GFS 12z and it looks more of the same to me a few more days of pointless coldish weather then milder.


NW Leeds - 150m amsl
idj20
12 February 2025 17:03:39

Please let it be over now.

Originally Posted by: The Dub Version 

Was just thinking that, just let it die already and move onto Spring. 

Looks like another week of this stalemate faces us. Still, it's better than stormy winds and frequent rain I suppose.


Home location: Folkestone Harbour.
Retron
12 February 2025 17:05:45
Despite the whinging in here (there is a moaning thread, guys), the model output remains interesting. The 12z MetO output, for example, is a good few degrees colder than the GEM/GFS at T+120. Would -11 or so be cold enough for snow for our Aberdonian friends, I wonder?

https://images.meteociel.fr/im/48/15895/ukmo_1_120oyl3.png 

UserPostedImage

EDIT: And looking at the dewpoint charts on the 12z GFS, while we will see widespread subzero dewpoints over the weekend and into next week, the really dry air - think -8 or below dewpoints - is now 150-200 miles further east than was shown a couple of days ago. Nothing on a global level, of course, but it makes quite a difference here!


Leysdown, north Kent
doctormog
12 February 2025 17:11:11

Despite the whinging in here (there is a moaning thread, guys), the model output remains interesting. The 12z MetO output, for example, is a good few degrees colder than the GEM/GFS at T+120. Would -11 or so be cold enough for snow for our Aberdonian friends, I wonder?

https://images.meteociel.fr/im/48/15895/ukmo_1_120oyl3.png 

UserPostedImage

Originally Posted by: Retron 

Based on past experience we would get a bit of cold rain with wintriness restricted to higher ground inland. Even the fabled BFTE was mediocre here and last month was actually more wintry. The long (mildish) sea trek means almost anything from the east is cool and grey and damp. That MetO chart fills me with little cheer.


Chunky Pea
12 February 2025 17:28:49

No surprise really to see all the 12z so far, aside from GFS, now have a marked easterly component still at 144.

We have, after all, just seen a classic easterly setup synoptically, complete with a 1050hPa high over Scandinavia and retrogression to Greenland, with heights remaining to the northeast. We've also seen an upper low over the Channel bringing instability and precipitation. Historically those blocks tend to last for longer than first modelled, and this seems to be no exception.

It's just been our damned bad luck that temperatures have been a few degrees too warm - and yes, it'd still have been too warm for most of us in the 80s!

At least with winds coming from the east or SE the cloud should, in theory, start to break in the south at least. The North Sea is injecting plenty of moisture into the mix at the moment, hence all the cloud.

Originally Posted by: Retron 

Some brutishly cold temps over Canada and northern States at the mo that will continue over the next 5 to 7 days at least. Makes you wonder if this will help fire up the Atlantic once again over the next couple of weeks. 3rd week of February is one of the stormier periods of the winter on average anyhow 


Patrick,

East Galway, Ireland.

Retron
12 February 2025 17:33:39

Based on past experience we would get a bit of cold rain with wintriness restricted to higher ground inland. Even the fabled BFTE was mediocre here and last month was actually more wintry. The long (mildish) sea trek means almost anything from the east is cool and grey and damp. That MetO chart fills me with little cheer.

Originally Posted by: doctormog 

That's interesting, as (like here) you had -15 850s during the BTFE. Perhaps being closer to the centre of the high meant less convective action than down here? Due to a geographical quirk, the mouth of the Thames and the shape of the Channel seem to cause convergence zones, as we had in 2018, yet up where you are they seem to be vanishingly rare... can't even remember seeing them on a chart TBH. I guess polar lows are more your thing, but again they're rare beasts.

I'm waiting to see what the dewpoints are on the 12z MetO charts... I have a feeling that -10 to -12 850 air as shown would come with some rather low dewpoints, but then again there's more mixing going on the further north you are.


Leysdown, north Kent
David M Porter
12 February 2025 17:38:15
Interesting UKMO 12Z this evening.

Only my view, but I am starting to get the feeling that a return of the atlantic next week may still not be a foregone conclusion as a few others have been suggesting over the past few days.


Lenzie, Glasgow

"A body of men holding themselves accountable to nobody ought not to be trusted by anybody." – Thomas Paine

doctormog
12 February 2025 17:38:44

That's interesting, as (like here) you had -15 850s during the BTFE. Perhaps being closer to the centre of the high meant less convective action than down here? Due to a geographical quirk, the mouth of the Thames and the shape of the Channel seem to cause convergence zones, as we had in 2018, yet up where you are they seem to be vanishingly rare... can't even remember seeing them on a chart TBH. I guess polar lows are more your thing, but again they're rare beasts.

I'm waiting to see what the dewpoints are on the 12z MetO charts... I have a feeling that -10 to -12 850 air as shown would come with some rather low dewpoints, but then again there's more mixing going on the further north you are.

Originally Posted by: Retron 

We did get some snow during the BFTE but even when the t850s were as low as -12°C we did actually get rain at times. The dewpoints are pretty low on the MetO chart at the time point you posted earlier so in this case it would probably just be cool/cold and grey as I think precipitation would be unlikely. I guess in a way it is “classic” winter weather, just not of the enjoyable type (here at least). I did get to experience the weekend’s easterly in the SE but have dried out now I’m back here. 😀


Retron
12 February 2025 17:48:40

We did get some snow during the BFTE but even when the t850s were as low as -12°C we did actually get rain at times. The dewpoints are pretty low on the MetO chart at the time point you posted earlier so in this case it would probably just be cool/cold and grey as I think precipitation would be unlikely. I guess in a way it is “classic” winter weather, just not of the enjoyable type (here at least). I did get to experience the weekend’s easterly in the SE but have dried out now I’m back here. 😀

Originally Posted by: doctormog 

I remember reading on usw many years ago that despite -10 850s and 510(!) thicknesses, there have been times when there's been rain on the coastal strip of Northern Ireland. I guess it's similar where you are - rain at -12 would be unlikely down here, even with a relatively long NE'ly sea track.

This precipitation chart from the MetO sums it up well. It shows -4C dewpoints for you at the same time, but yes... there's a thin strip of rain around the coast (and a larger strip further south, where dewpoints are much higher). That boundary layer modification is quite something!

https://images.meteociel.fr/im/69/2488/ukmohd_uk1_42_93_0zet3.png 

UserPostedImage


Leysdown, north Kent
nsrobins
12 February 2025 18:14:05
Comms and power issues at ECMWF HQ - 12Z run not initiated yet.
Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

North Downs Man
12 February 2025 18:18:40
 Can anyone recall a cold rain producing winter Easterly from before about ten years ago? My (probably selective) memory is of almost entirety rain streamers from 2014 0nwards, whereas previously (including twice in 2010) they always brought snow to Kent and many other Eastern counties (and lots of it).
Dover, Kent, 15m asl
Chunky Pea
12 February 2025 18:20:56

Comms and power issues at ECMWF HQ - 12Z run not initiated yet.

Originally Posted by: nsrobins 

Yep, 12z  not showing on the site I usually use. 


Patrick,

East Galway, Ireland.

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