The Weather Outlook

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tallyho_83
04 December 2025 18:23:49
12z looks even more bizarre and unseasonal. Look at how warm Europe is on whole?

To get any cold you have to go to Northern Scandinavia in mountains.

Looks like the ski season will suffer as well +123z:

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

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Sean Moon

Magical Moon

www.magical-moon.com

doctormog
04 December 2025 18:59:18

I get the feeling that post 180 things are stirring a little. Not so much in the Europe sector, but northern hemisphere wise it is starting to look interesting.

Originally Posted by: warrenb 

The synoptics in the latter half of the 12z ECM op run are interesting, At a glance the picture looks the same as before (milder than average and unsettled) however the progression is interesting when you look at it from a N hemisphere perspective.


tallyho_83
04 December 2025 20:20:33

The synoptics in the latter half of the 12z ECM op run are interesting, At a glance the picture looks the same as before (milder than average and unsettled) however the progression is interesting when you look at it from a N hemisphere perspective.

Originally Posted by: doctormog 

Can I ask - How is that interesting? Looks like another cold plunge into the NE states and more milder weather and cyclogenesis for the UK

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

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Sean Moon

Magical Moon

www.magical-moon.com

ballamar
04 December 2025 20:49:49

Possibly, but I'm not really sure I agree. Look at the anomaly on the latest GEFS update.

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Originally Posted by: Brian Gaze 

Patterns are just increasingly warm! Would say we are living during a tipping point in the climate where frost might even disappear for lengthy periods. Euro highs look like they are extra stubborn now

doctormog
04 December 2025 21:07:40

Can I ask - How is that interesting? Looks like another cold plunge into the NE states and more milder weather and cyclogenesis for the UK

UserPostedImage

Originally Posted by: tallyho_83 

You posted a single chart at day 15? I guess you didn’t understand my comment. It’s not the synoptics at one time point, it is the progression and I was referring to the second half of the 0-240 hr time period not the extended part that was not available at the time I wrote the post. If you look at the northern hemisphere view and the transition from day 5 or 6 to day 10 you will see what I mean. An isolated chart at day 15 rather misses the point I was making.

i agree the single chart you posted isn’t overly interesting from a wintry point of view, but I never said it was.


Brian Gaze
04 December 2025 21:19:22
Still looks like an uphill struggle to me. Here's the 12Z ECMWF AIFS.

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Brian Gaze

Berkhamsted

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

doctormog
04 December 2025 21:26:54

Still looks like an uphill struggle to me. Here's the 12Z ECMWF AIFS.

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Originally Posted by: Brian Gaze 

Yes the general consensus currently is a mild and unsettled picture.


idj20
04 December 2025 22:19:32
Yeah, the 18z GFS op can go straight into the bin with the 10th to mind. At least it is on its own with that thinking. 

PS: Just looked at the ensemble, the OP is very much an outlier with the wind speed for that day. 


Home location: Folkestone Harbour.
Matty H
04 December 2025 23:19:57

That is frightening really - roughly 4c above average throughout. 

Originally Posted by: scillydave 

Frightening? Encouraging. 


Yate, Nr Bristol

TBFTEIARBSC

BJBlake
05 December 2025 00:22:24

I recommend the video to which I provided a link in the Environment thread if you would like to understand better just how frightening things look.

Originally Posted by: Gandalf The White 

Hi Gandalf, I cannot find this link - having searched the threads under weather and Science & Nature. Can you post in this thread - it is after all relevant to interpretation of the model anomalies. Not that want to be frightened - as I get enough of that every time I listen to the news on the economy or the bunkum politicians spout!! LOL, but we need to know the inconvenient truth. Thank you.


Brecklands, South Norfolk 28m ASL
The Beast from the East
05 December 2025 02:51:32

Frightening? Encouraging. 

Originally Posted by: Matty H 

Yes, climate change is generally good for the UK  but a disaster for other parts of the world as we have already seen in Asia recent weeks, which will fuel climate refugees forced flee to western countries which someone like you will hate

So its not encouraging. It is a disaster for us all


Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President

scillydave
05 December 2025 05:41:14
Looking at the current output there's a good chance that the date record temperature will fall on Monday 8th. 15.8c is the figure to beat.
Currently living at roughly 65m asl North of Cowbridge in the Vale of Glamorgan.

Formerly of, Birdlip, highest village in the Cotswolds and snow heaven in winter; Hawkinge in Kent - roof of the South downs and Isles of Scilly, paradise in the UK.

BJBlake
05 December 2025 08:19:58
Back on topic - the ECM finishes in week 2 with a ‘Greenie’ and a northerly returning temperatures to normal almost in time for Chrimbo! Normal temperatures might be the new White Christmas!! The Greenie could be the SSW effect and it may be a transitory as the SSW, but the HP could build a ridge south and create a block and repeat of November’s cold spell, with any luck. That would be the best Christmas present for Me, being a nostalgic coldie.
Brecklands, South Norfolk 28m ASL
Brian Gaze
05 December 2025 08:20:00
December is starting to look like it could be a record-breaker. The caveat is that the early part of November followed a similar trajectory. 

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Brian Gaze

Berkhamsted

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

David M Porter
05 December 2025 08:35:45

December is starting to look like it could be a record-breaker. The caveat is that the early part of November followed a similar trajectory. 

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Originally Posted by: Brian Gaze 

Indeed, Brian. If December plays out as the output currently suggests then there might be a chance of this December being the mildest on record. As you say though, November started with near-exceptional mildness with some discussion then of last month possibly being the mildest November on record, and yet look at how quickly we went from that to a rather colder spell for a while. At the moment, it's too early to be sure and we shall just have to wait and see how things play out over the remaining three-and-a-half weeks of this month.


Lenzie, Glasgow

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

DEW
  • DEW
  • Advanced Member
05 December 2025 08:42:34
FAX has a whole bunch of fronts out to the SW, but pushed through quickly as the controlling LP moves to NW Scotland 980mb tomorrow. The procession of fronts continues on a strong SW-ly promoted by LP settled in mid-Atlantic ca 970mb to Tue 9th, on which date a local LP crosses NE Scotland 972mb.

GFS Op omits the LP Tue 9th but continues to produce LP in mid Atlantic; 985mb Fri 12th, filling and forming a trough over Ireland with direct S-lies for the rest of Britain Sun 14th; 960mb  Rockall Wed 17th with strong SW-lies back again; 960mb N Ireland Fri 19th, this one crossing Britain and followed by W-lies. Strong jet stream mostly running near S Britain with only a brief break around Sat 13th.

ECM does have the small LP Tue 9th, but over N Ireland; then LP as above mid Atlantic but remaining active near the Faeroes with colder W-lies by Mon 15th, moving to mid-Norway by Fri 19th with a cold N-ly behind it. Less chance of a date record with this model.

AIFS: London, maximum Wed 10th 14C, dipping before returning to 10-12C Mon 15th, rain at intervals, perhaps briefly drier around Fri 12th. Edinburgh, maxima mostly 8-9C but down and up in the second week. Rain as for London

GEFS: at T+180 most perturbations have LP near NW Britain and S/SW-lies for Britain itself. Very mild to Thu 11th (brief dry spell at that date) then mean near norm, rain heavy at first and then in smaller amounts later, more persistent in W.

I could have saved  myself a lot of typing by just putting "Unsettled and mild"!


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

GroundhogDay
05 December 2025 08:56:17
23 year lurker finally joining the fray. 

The ECM +72 really sums up winter model watching during the past decade. Such potential up north but absolutely no chance of it being realised due to those pesky southern heights. 

* Sorry guys, but cannot fathom how to attach supporting evidence! I did click on what appears to be an image icon, but it didn't work as planned


Based in the snow desert that is North Northants
Brian Gaze
05 December 2025 10:22:45

23 year lurker finally joining the fray. 

The ECM +72 really sums up winter model watching during the past decade. Such potential up north but absolutely no chance of it being realised due to those pesky southern heights. 

* Sorry guys, but cannot fathom how to attach supporting evidence! I did click on what appears to be an image icon, but it didn't work as planned

Originally Posted by: GroundhogDay 

Welcome to TWO. 😊👍

I've just moved your follow up post to the breakout thread which more suited to OT discussion. See here:

https://www.theweatheroutlook.com/twocommunity/Posts/m1669752-Model-output-breakout-thread 


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

Russwirral
05 December 2025 10:32:41
850s are alot more blue than green on this mornings output across ECM and GFS

Id say it was the beginning of a new trend, but actually, Im just hoping its the end of the current trend.


Saint Snow
05 December 2025 10:34:06
It's actually insane how run after run, with only a couple of exceptions, have shown low pressure sat almost unmoving about halfway between Ireland and Iceland for literally the entire run. AIFS  is particularly strong on this. It feeds front after front over the UK.

The 0z GFS is one run that does try to break the cycle, by showing the blocking over the Arctic ridging southwards in thr 6-8 day period. But it's too far west to really impact us, and quickly gets pushed back north by the next bout of raging cyclogenesis over Baffin/Labrador.


Martin

Home: St Helens (26m asl) Work: Manchester (75m asl)

A TWO addict since 14/12/01

"How can wealth persuade poverty to use its political freedom to keep wealth in power? Here lies the whole art of Conservative politics."

Aneurin Bevan

Hippydave
05 December 2025 11:03:04
Re a record breaking Dec CET, it'll be interesting to see where we sit after around 11th Dec and after the very mild 3-4 days leading to then. The ens are suggesting very mild but not quite *that* mild to me - my recollection of 2015 and the 9.5c record, being a month of exceptionally mild day temps with cloudy nights. I don't think the ens are at that level and the mildness seems to be toned down post the 11th (still mild but not unusually so).

Overall though there's generally very little to get excited about cold wise on any of the main models. Other than taking a model watching break, for me it's a case of chasing transient cold sectors bringing snow to the Scottish mountains and whether any of the LPs deepens enough to bring any strong winds. The latter more interesting in theory than practice if it ended up windy enough to cause damage! 

Silver linings to the current set up being most areas will see fairly significant rainfall, so deprived areas have a chance to replenish stocks and it's keeping heating bills down. (Appreciate some areas don't need any more wet weather though).


Home: Tunbridge Wells

Work: Tonbridge

Hippydave
05 December 2025 11:14:19
Just to follow on from above and to pick out some 'interesting' charts from the 6z:-

Windy IMBY:-

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Wintry for some (it's deep FI and won't look like this next run obviously!):-

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A wet 10 days ahead for most places, following a wet first few days of December:-

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Slim pickings I guess but being odd I do enjoy proper rainfall, at least it means the weather's doing something and not just drizzly and mild. 


Home: Tunbridge Wells

Work: Tonbridge

Russwirral
05 December 2025 11:14:37
With this being 7 days out, and looking at the progressive nature of the last 4 runs, this seems to be not far off from something half decent.

Probably just crumbs, but seems interesting:

https://www.wxcharts.com/api/contentwithoverlay/gfs_op/EUR_NA/850temp/2025-12-05T06:00:00Z/2025-12-11T18:00:00Z 


GroundhogDay
05 December 2025 11:34:55
Cheers Brian 👍
Based in the snow desert that is North Northants
Heavy Weather 2013
05 December 2025 11:43:32
Is it just me but is the 06z trying to do something different at 144hrs?
Mark

Beckton, E London

Less than 500m from the end of London City Airport runway.

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