The Weather Outlook

Remove ads from site

Hippydave
29 December 2025 19:41:38
Not the worst GEFS and as a plus we're down to just one outlier in the shorter term😜

UserPostedImage

There's obviously a fair few members that agree with the op to some degree but not universal agreement and there's still a reasonable number of colder members. Could be better, could be worse! (Should mention as you'd expect the ens look rosier/even rosier the further towards the frozen wastelands of the north you get). 


Home: Tunbridge Wells

Work: Tonbridge

Jiries
29 December 2025 20:01:20
Nice 12z ensembles for here with now the mean -10C and a lot of them below this and not dry either on the -10 levels so there will be snowfalls at times due to LP around.  
Hippydave
29 December 2025 20:41:10
I've seen more convincing breakdowns than the ECM extended:-

UserPostedImage

Deep FI etc. etc. but who knows, maybe our unsettled interlude will be just that and we'll be back under a raw North or North Easterly a few days down the line.

Edit - the ens are generally reasonable too imo - decent agreement for cold until circa 6th to the 8th, a fair few runs keep it chilly/cold and there's a few cheeky cold fellas.

UserPostedImage

Other parts of the country do of course exist and as you'd expect given the setup things look a little cleaner/colder for Scotland for example:-

UserPostedImage


Home: Tunbridge Wells

Work: Tonbridge

Brian Gaze
29 December 2025 21:09:18
The ECMWF IFS based ensembles remain solid this evening, whereas the AI based ones again show a quicker transition back to milder conditions.

UserPostedImage 


Brian Gaze

Berkhamsted

TWO Buzz - get the latest news and views 

"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan

Ally Pally Snowman
29 December 2025 21:20:55
Yes big difference now , very interesting to see which one is nearer the mark. We know ECM has a historical issue with over doing Greenland HP but I've also noticed AIFS ensembles are very quick to return to the long term average in the 10 + day period.
Bishop's Stortford 85m ASL.
doctormog
29 December 2025 21:33:26
I’m not (yet) convinced that there is enough verification evidence or data to view the AI models as anything other than experimental compared with the rest of the NWP. To me they are of passing interest rather than to be viewed in the same light as the other models. That will probably change as more verification stats become available over the next few years.
Chunky Pea
29 December 2025 21:43:43
Whatever about deep cold, there is little sign of anything particularly mild as we head into the opening days of January. That said, however, any attempt at milder Atlantic air moving in could spin up quite vigorously as it encounters that entrenched cold air mass over the broader NE Atlantic region. Something to perhaps keep an beady eye on over the coming weeks. 
Patrick,

East Galway, Ireland.

Snowedin3
29 December 2025 21:53:50
Hello Everyone! Hope you all had a good Christmas! new year is looking exciting! I would say that for those in the south Snow is rarely forecasted this far out and happens as forecasted so we just need to soo what happens the closer we get, I’m sure we’ll have troughs and small lows spin up at short notice D x
Dean Barnes

Finstock, Chipping Norton, Oxfordshire

160m ASL 525 Ft

Hippydave
29 December 2025 22:20:04
Hmmm, eyebrow quirked (on other people's behalf not mine so much). 

Little disturbance around Iceland at T60:-

UserPostedImage

Ends up NW Scotland at T81 (ish):-

UserPostedImage

Then wanders down the country:-

UserPostedImage

Exiting somewhere Norfolk/Suffolk way:-

UserPostedImage

I think something similar was there in one of the earlier runs too - something to keep an eye on maybe. (UKMO does have a little feature of rain, boo, ECM seems to have a little feature that keeps further west and is again mostly rain, boo).

Bigger picture wise upto T150 and unsurprisingly not an enormous amount of change - still cold but HP cell is gradually sinking, will it sink and go mild or revert to a bullseye for snow somewhere? (Oh and there's another little feature over Wales at that point too, ends up rain on it's western flank and snow on its eastern flank as it sinks down through central england).

Edit: and it's another cold gets pushed away by a regulation west to eastward moving front around 07/01. Maybe could get a lee northerly behind it as HP tries to ridge in the Atlantic. Ah well. 


Home: Tunbridge Wells

Work: Tonbridge

fairweather
29 December 2025 22:30:01

I'm in a north and east-facing area but don't expect much, if anything, in terms of snow. 

Neither the op GFS nor the ICON are overly inspiring (with my snow fan hat on), both singing from the same sheet in the 180+ timeframe - both showing the sort of breakdown looming where things just warm up and there's no transitional snow. 

Thankfully a week remains a very long time given the current setup and I'm sure there'll be plenty of twists and turns to come. At least there will be some genuinely cold weather around from New Year's Eve (down here) and earlier further north.

EDIT: GEM is more interesting, though, showing plenty of trough disruption as the Atlantic slowly makes inroads. Plenty of snow, but only north of the M4!

SECOND EDIT: The MetO follows along the lines of GFS/ICON - a bit of a theme tonight! 

Originally Posted by: Retron 

Something has made that a certainty almost in the last decade for some reason!


S.Essex, 42m ASL
fairweather
29 December 2025 22:31:39
Looking good for Scotland for snow in the coming days. With warnings out I would think it is their best chance for a few years of something significant accumulating.
S.Essex, 42m ASL
Rob K
29 December 2025 22:38:34
Breakdown picking up pace on the 18Z GFS. 

Have to hope for an about turn tomorrow as today has not been a good day of model watching!


Yateley, NE Hampshire, 73m asl

"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome

moomin75
29 December 2025 22:41:48

Breakdown picking up pace on the 18Z GFS. 

Have to hope for an about turn tomorrow as today has not been a good day of model watching!

Originally Posted by: Rob K 

Yep. No dressing this up, its not great 18z run for longevity.

What appears definite is a short, fairly potent cold snap with snow for a lucky few, followed by the Atlantic returning, and much quicker than previous runs. Still time for it to change again for the better, and hopefully we are just looking at the usual model wobbles.


Witney, Oxfordshire

100m ASL

Ally Pally Snowman
29 December 2025 22:41:53
GFS 18z another run that breaks the cold early about the 7th. We need this trend to be dropped tmrw otherwise could be a massive non event for most.
Bishop's Stortford 85m ASL.
fairweather
29 December 2025 22:42:26

Northerly based outbreaks with a NW tilt will usually favour The northern half of Scotland, Wales the Moors of the SW and maybe NYM.

Most other areas are dependent on troughs and polar lows.  As usual altitude is king, perhaps ever more so. And of course as Retron says, the further north the better!

Lots to play for and I will have a look at the 0zs with interest.

Originally Posted by: Man For All Seasons 

Unless we get a seriously cold near Continent the North has and always will fair better for snow in the winter months, especially in a N/NW ly. If we ever get France freezing with snow cover and a S.E ly then I'll get interested for here.


S.Essex, 42m ASL
doctormog
29 December 2025 22:57:22
Out to the 5th of January (as far as they go at time of writing) the GEFS 18z ensembles are a little cooler than the 12z equivalent.

Edit: This is the day 7 (168 hr) GEFS mean showing good consistency up this point at least: https://www.wetterzentrale.de/maps/GFSAVGEU18_168_1.png 

UserPostedImage


Rob K
29 December 2025 22:57:52
GFS control is even worse than the op run. The wheels rapidly seem to be falling off this one with a flat westerly attack by the weekend. 
Yateley, NE Hampshire, 73m asl

"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome

Brian Gaze
29 December 2025 23:02:08
This shows all the 18Z runs on 05/01.

UserPostedImage


Brian Gaze

Berkhamsted

TWO Buzz - get the latest news and views 

"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan

tallyho_83
29 December 2025 23:20:12

Out to the 5th of January (as far as they go at time of writing) the GEFS 18z ensembles are a little cooler than the 12z equivalent.

Edit: This is the day 7 (168 hr) GEFS mean showing good consistency up this point at least: https://www.wetterzentrale.de/maps/GFSAVGEU18_168_1.png 

UserPostedImage

Originally Posted by: doctormog 

Yes - 18Z GFS ENS mean for 5th is -8.3c compared to the -7.8c in 12z that's all I have to say that is good about the 18z:

https://www.wetterzentrale.de/en/show_diagrams.php?geoid=49068&model=gfs&var=2&run=18&lid=ENS&bw=1 

But a lot of runs are very keen to get the Atlantic back by 5th/6th!?


Home Location - Vixen Tor Close, Okehampton, Devon (221m ASL)

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

Sean Moon

Magical Moon

www.magical-moon.com

BJBlake
29 December 2025 23:22:48
Yes Brian, whilst Pete Tong seems to be the uninvited guest to so many a Two winter cold weather model watching party, there are still 11 pert’s with prolonged cold in the GFS pub run, which out of 30 is 37%, odds I would have taken a few days ago, when even the Arctic blast  Was looking doubtful.  Perhaps it wont be the 1979 we hoped it might from the brief alignment of Mid-term to FI models, but anything cold and wintry is a bonus these days, and at least the Alps will be snowy at last from the brief incursion of cold for the ski trips planned.
Brecklands, South Norfolk 28m ASL
Sasa
  • Sasa
  • Advanced Member
29 December 2025 23:29:42

Yes Brian, whilst Pete Tong seems to be the uninvited guest to so many a Two winter cold weather model watching party, there are still 11 pert’s with prolonged cold in the GFS pub run, which out of 30 is 37%, odds I would have taken a few days ago, when even the Arctic blast  Was looking doubtful.  Perhaps it wont be the 1979 we hoped it might from the brief alignment of Mid-term to FI models, but anything cold and wintry is a bonus these days, and at least the Alps will be snowy at last from the brief incursion of cold for the ski trips planned.

Originally Posted by: BJBlake 

I think that’s a fair take, but the latest runs do tilt the balance a bit.

Yes, there are still a meaningful chunk of cold members hanging on double-digit support for prolonged cold is nothing to sniff at given where we were a few days ago. But the trend across the last couple of runs is that the block is losing leverage, with the Atlantic starting to probe more effectively and the cold looking less self-sustaining than it did earlier in the week.

So it feels like we’ve moved from “potentially special” to “take what you can get”. Probably not a 1979-type outcome, agreed, but still a decent cold interlude by modern standards and as you say, any sustained cold and wintry weather is a bonus these days. The Alps certainly look like beneficiaries, which is no bad thing for those with trips lined up. They really need it as there has been no real  fresh snow in most parts  for nearly 4 weeks now.


Kingston Upon Thames
Rob K
29 December 2025 23:35:41

Out to the 5th of January (as far as they go at time of writing) the GEFS 18z ensembles are a little cooler than the 12z equivalent.

Edit: This is the day 7 (168 hr) GEFS mean showing good consistency up this point at least: https://www.wetterzentrale.de/maps/GFSAVGEU18_168_1.png 

UserPostedImage

Originally Posted by: doctormog 

For the south the 18Z GEFS mean is a fair bit quicker to bring in mild air. Something has shifted in the output that suggests a swift breakdown… if breakdown is the right word as it never really arrives in the south in the first place!


Yateley, NE Hampshire, 73m asl

"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome

Ally Pally Snowman
29 December 2025 23:38:46
AIFS 18z another stinker. As soon as the Met Office jump on board it goes ti!s up, always the way.


Bishop's Stortford 85m ASL.
Chunky Pea
29 December 2025 23:55:10

Looking good for Scotland for snow in the coming days. With warnings out I would think it is their best chance for a few years of something significant accumulating.

Originally Posted by: fairweather 

A snow covered Scotland is good for enhancing cold over Ireland when winds are from that direction, just as it is for England when winds are directly from the north. 


Patrick,

East Galway, Ireland.

tallyho_83
30 December 2025 00:24:52

AIFS 18z another stinker. As soon as the Met Office jump on board it goes ti!s up, always the way.

Originally Posted by: Ally Pally Snowman 

Yes, and sorry to go OT but keep in mind this is from 3rd January - 12th: - Yet even the longer range update from 13th - Jan 27th - the Met O still talks of HP centred to the west of UK and cold with frost etc. It is NOT until Mid month the Met O talks about the "potential" for changeable conditions. - See below: - I wonder if the forecast will change tomorrow's update in line with models?

Saturday 3 Jan - Monday 12 Jan

Northerly winds will bring a spell of very cold, wintry conditions to much of if not all of the UK through at least the early part of this period. These will bring snow showers to areas that are exposed to onshore winds. Subtle day-to-day changes in wind direction will change the places most exposed to the showers, but where they occur some significant accumulations of snow are likely. There are likely to be some more coherent bands of sleet and snow working south, and these may bring a risk of more prolonged and widespread wintry precipitation affecting some inland areas. Things become less certain by the second week of January, however it's possible the cold conditions may persist with an ongoing risk of winter hazards across much of the UK.

Updated: 14:00 (UTC) on Mon 29 Dec 2025

Tuesday 13 Jan - Tuesday 27 Jan

High pressure will probably be close to the UK at the start of this period, perhaps most likely centered to the west, and whilst this may allow relatively settled and dry conditions with a risk of frost and fog initially, there will be the chance of some occasional wet weather at times, perhaps more especially in the north and east. Given some relatively cold air close to the UK, this may bring the chance of some wintry hazards in places. Towards mid-month, there is the potential for rather more changeable conditions to develop more widely, although confidence in this aspect of the forecast is currently low.

Updated: 15:00 (UTC) on Mon 29 Dec 2025

https://www.metoffice.gov.uk/ 


Home Location - Vixen Tor Close, Okehampton, Devon (221m ASL)

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

Sean Moon

Magical Moon

www.magical-moon.com

Remove ads from site