The Weather Outlook

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Matty H
02 February 2025 10:30:00

Contingency planners must be making some pre preparation for the small chance we are going to have a disruptive spell of weather. Didn’t we used to have some members that had some inside knowledge? Obviously a lot can change but the chances are increasing day by day.

Originally Posted by: ballamar 

As Liam Dutton has mentioned, it’s more of a fart of cool air rather than anything remotely resembling the original BFTE. I’m just hoping for more of this lovely sunshine. You can feel the suns strength now this time of year out of any wind. Looks like more to come on current output 


Yate, Nr Bristol

TBFTEIARBSC

fairweather
02 February 2025 11:07:42

As Liam Dutton has mentioned, it’s more of a fart of cool air rather than anything remotely resembling the original BFTE. I’m just hoping for more of this lovely sunshine. You can feel the suns strength now this time of year out of any wind. Looks like more to come on current output 

Originally Posted by: Matty H 

Unsurprisingly Nick Miller seems to disagree saying there could be significant cold after next weekend. The truth is it could be either!


S.Essex, 42m ASL
tallyho_83
02 February 2025 11:10:51
06z Show a cold pool of -10c uppers heading into England and Wales @ +222

could be cold enough for snow flurries ??

UserPostedImage

06z Control brings the -10c uppers in earlier on 10th: - But mostly for the south,.

UserPostedImage


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

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Sean Moon

Magical Moon

www.magical-moon.com

Matty H
02 February 2025 11:18:09

Unsurprisingly Nick Miller seems to disagree saying there could be significant cold after next weekend. The truth is it could be either!

Originally Posted by: fairweather 

Yet Liam is correct. The cold pool over the continent isn’t even close to what it was on the BFTE


Yate, Nr Bristol

TBFTEIARBSC

The Beast from the East
02 February 2025 11:22:24

Yet Liam is correct. The cold pool over the continent isn’t even close to what it was on the BFTE

Originally Posted by: Matty H 

ECM ens remain poor with the high the wrong shape and not able to send any deep cold.

GFS is better but the good stuff is still over a week away. 

Unfortunately we will probably end up with a chilly SE flow, just hope its sunny and not a dirty high


Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President

Hippydave
02 February 2025 11:22:37
I always find easterly spells interesting to analyse, even when the weather they produce isn't. 

Taking the current possible one, there's a few things I'll be looking at:-

* What are the actual on the ground temps? If uppers aren't overly cold do we get low level cold IMBY via the continent or do we pick up air that's travelled over the North Sea, in which case for me it's likely to be chilly but miserable whilst further west it'll be cool to average and sunny? 

* Are the uppers cold enough for decent convection to form over the sea? Most decent easterlies have a deep cold pool that moves through, drops some snow and then whilst uppers moderate the surface air is cold and stays that way, with any further precip falling as snow despite modest uppers.

* Will we get a reload with another cold pool moving through, either due to the HP sticking around for long enough or due to it relocating?

Easterlies are one of those uncommon patterns that I find quite hard to read in terms of surface weather at anything other than close range. You can have cold uppers but limited convection, cold uppers and a lot of convection, coldish uppers with surface moderation and fairly uninspiring cool but not cold temps, unspectacular uppers with very cold surface air (if you import it from the continent), clear skies, perma gloom, convection closer to the centre of the HP and nothing on the periphery etc. 

In terms of the current pattern I like Michaels rather succinct summary of what's looking likely. An easterly influence of some description looks highly likely, the detail after that is TBC. I guess as you'd expect given it's currently in FI, the models aren't really strongly agreeing on whether we import any decently cold uppers and for how long and there's still a chance looking across the ens suites that we only get a gentle and not particularly cold easterly drift with a slow wander back to something more typical. I think as it stands that's an outside chance but as ever even though for MBY it looks much more likely we'll get at least a day or two of uppers around the -7 to -10c range, I'll wait until that's in the 4-5 day range before getting too interested.


Home: Tunbridge Wells

Work: Tonbridge

Rob K
02 February 2025 11:24:35
6Z GFS ends on an intriguing note with cold air coming from the north and east, either side of a mini UK high pressure.

As always seems to be the case though, the interesting bits tend to get pushed back by about 24 hours each day, once the models pick up something that looks interesting!


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

Hippydave
02 February 2025 11:37:04

Yet Liam is correct. The cold pool over the continent isn’t even close to what it was on the BFTE

Originally Posted by: Matty H 

Which is true and I understand the desire to make it very clear that we're not looking at depth of cold close that spell involved, with usual hype coming from some sections of the media.

That said though ultimately most models are showing a strong possibility of air around -8 to -10c at 850 level at least for some and for a couple of days, which would likely result in temps of 1-3c on the surface and *if* things align could lead to some snowfall for prone areas. I suspect your average member of the public won't care if it's -15c or not at 850 level if it's cold at the surface and the traffic is screwed due to a bit of snow.  You can go too far stressing it's not 'classic spell of winters past' IMO and end up misleading people to thinking it's just going to be a few cool days and end up looking a bit daft if it ends up more than that. (Unless that's what happens of course and/or the models back away from anything more than a brief chilly spell, in which case it would be reasonable for Mr Dutton to go in to full on Kryten smug mode😂). 

I haven't seen the forecast but if it was me I'd be making it clear it's not the same as 2018, the airmass is noticeably less cold but if the pattern persists it's currently looking possible for the weather to move through chilly to cold with increased chances of some snow but that's a long way off, keep tuned to the forecasts etc. etc. 


Home: Tunbridge Wells

Work: Tonbridge

squish
02 February 2025 11:38:58
The BFTE didn’t start evolving until the 20/21 Feb .  The Synoptics evolving now are no guarantee of a major cold outbreak…but all the building blocks are beginning to fall into place ..and it looks like turning cold from mid week onwards from the east . How cold it will get is uncertain but a fascinating watch . 


D.E.W on Dartmoor. 300m asl
StoneCroze
02 February 2025 11:43:46
Interesting, sea temp. locally is 8.6C. I'll be keeping an eye out for Channel streamers.

GFS is indicating light snow flurries coming down the Channel, from afternoon on the 10th onwards.


Alderney, Channel Islands. (previously known as Beaufort)
Rob K
02 February 2025 11:52:20
Quite a decent GEFS ensemble mean at 192 hours on the 6Z

https://modeles16.meteociel.fr/modeles/gens/runs/2025020206/gens-31-0-192.png 


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

nsrobins
02 February 2025 11:55:54

Yet Liam is correct. The cold pool over the continent isn’t even close to what it was on the BFTE

Originally Posted by: Matty H 

2018 was a significant event 850 wise - up there with the top five of the last few decades. You don’t need -14 uppers to generate snow. -8 to -10 will do the job of the feed is between 80 deg and 120 deg for example.

My interpretation is we have a cold spell incoming, but how cold and how snowy is a fair way yet from being resolved.


Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

Gandalf The White
02 February 2025 12:17:39

Yet Liam is correct. The cold pool over the continent isn’t even close to what it was on the BFTE

Originally Posted by: Matty H 

If the airflow was coming from the continent he’d be right, but is it?  It doesn’t look like a south-easterly flow to me?


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



ballamar
02 February 2025 15:48:13
ICON looks decent with an easterly 
Matty H
02 February 2025 15:51:59

If the airflow was coming from the continent he’d be right, but is it?  It doesn’t look like a south-easterly flow to me?

Originally Posted by: Gandalf The White 

Agreed, but he was referring to the depth of cold that could be tapped into. 

As others have noted, you don’t need BFTE levels of cold for snow, but then again I don’t recall anyone saying you do. 


Yate, Nr Bristol

TBFTEIARBSC

BJBlake
02 February 2025 15:55:17

I always find easterly spells interesting to analyse, even when the weather they produce isn't. 

Taking the current possible one, there's a few things I'll be looking at:-

* What are the actual on the ground temps? If uppers aren't overly cold do we get low level cold IMBY via the continent or do we pick up air that's travelled over the North Sea, in which case for me it's likely to be chilly but miserable whilst further west it'll be cool to average and sunny? 

* Are the uppers cold enough for decent convection to form over the sea? Most decent easterlies have a deep cold pool that moves through, drops some snow and then whilst uppers moderate the surface air is cold and stays that way, with any further precip falling as snow despite modest uppers.

* Will we get a reload with another cold pool moving through, either due to the HP sticking around for long enough or due to it relocating?

Easterlies are one of those uncommon patterns that I find quite hard to read in terms of surface weather at anything other than close range. You can have cold uppers but limited convection, cold uppers and a lot of convection, coldish uppers with surface moderation and fairly uninspiring cool but not cold temps, unspectacular uppers with very cold surface air (if you import it from the continent), clear skies, perma gloom, convection closer to the centre of the HP and nothing on the periphery etc. 

In terms of the current pattern I like Michaels rather succinct summary of what's looking likely. An easterly influence of some description looks highly likely, the detail after that is TBC. I guess as you'd expect given it's currently in FI, the models aren't really strongly agreeing on whether we import any decently cold uppers and for how long and there's still a chance looking across the ens suites that we only get a gentle and not particularly cold easterly drift with a slow wander back to something more typical. I think as it stands that's an outside chance but as ever even though for MBY it looks much more likely we'll get at least a day or two of uppers around the -7 to -10c range, I'll wait until that's in the 4-5 day range before getting too interested.

Originally Posted by: Hippydave 

Great Summary - and all very true. The scenario has been batted about for 2 weeks, and is only now gaining momentum with cross model support. Enjoy the ride, this is model watching in the top 20% end of the spectrum, and we might yet end up in the top 5%. 


Brecklands, South Norfolk 28m ASL
ballamar
02 February 2025 16:59:06
Wow ridiculous op run from GFS, could cause some issues countrywide
nsrobins
02 February 2025 17:00:18
The latter stages of the 12Z GFS might get the pulses racing. Full on 80s mode.
Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

Taylor1740
02 February 2025 17:09:04

The latter stages of the 12Z GFS might get the pulses racing. Full on 80s mode.

Originally Posted by: nsrobins 

Yes indeed, but even then the 850s and forecast 2m temps are not that cold, would hope it would end up colder than that if the pattern did evolve that way.


NW Leeds - 150m amsl
ballamar
02 February 2025 17:13:36
That chunk of the PV is clearly sinking into Europe on this run - obviously that signals a huge cold spell but how likely is it? Who knows but is a fun run to observe

As runs go possibly one of the best, background signals sort of support it. Could be quite a cold February 

Brian Gaze
02 February 2025 17:14:19
Here's the snow depth animation from it.

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

Jiries
02 February 2025 17:27:27

The latter stages of the 12Z GFS might get the pulses racing. Full on 80s mode.

Originally Posted by: nsrobins 

That will welcome and greet Darren when he back home from Japan like myself really want an 80's proper cold freeze type to arrive   I am after proper subzero temps which is my priority, less cold temps 1-4C thanks but no thanks.

Heavy Weather 2013
02 February 2025 17:30:12

That will welcome and greet Darren when he back home from Japan like myself really want an 80's proper cold freeze type to arrive   I am after proper subzero temps whcih si the main priority, less cold temps 1-4C thanks but no thanks.

Originally Posted by: Jiries 

We deserve a reward for this winter. So much cloudy highs. We need this.


Mark

Beckton, E London

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

jhall
02 February 2025 17:31:24
The GFS OP FI reminds me a bit of the start of the 1962-3 winter, when a very cold easterly which had set in a few days before Christmas was replaced on Boxing Day by an equally cold northerly. (I hope I haven't jinxed it!)
Cranleigh, Surrey
nsrobins
02 February 2025 17:33:54

The GFS OP FI reminds me a bit of the start of the 1962-3 winter, when a very cold easterly which had set in a few days before Christmas was replaced on Boxing Day by an equally cold northerly. (I hope I haven't jinxed it!)

Originally Posted by: jhall 

I’ll get your coat 😉

(You’re going to need it).

Short GEFS solid. -8 mean London by 9th.


Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

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