The Weather Outlook

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Rob K
22 November 2024 17:07:56
GEM 12Z disappoints. GFS is not too interesting but at least anticyclonic and probably fairly seasonal.
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

Quantum
22 November 2024 17:13:02

GEM 12Z disappoints. GFS is not too interesting but at least anticyclonic and probably fairly seasonal.

Originally Posted by: Rob K 

Although there could be a snow event next Tuesday.


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

idj20
22 November 2024 17:37:43

Pretty serious cool down for North America forecast towards the end of the month. Will be interesting to see what knock on effect that may have on this side of the pond with time. 

Originally Posted by: Chunky Pea 

That's easy, it'll only serve to ramp up the north Atlantic jet stream and produce cyclogenesis = frequent wet & windy conditions to the UK. Happens every time. Nothing comes good of deep cold over North America - unless you like stormy weather. 


Home location: Folkestone Harbour.
Quantum
22 November 2024 17:54:55

That's easy, it'll only serve to ramp up the north Atlantic jet stream and produce cyclogenesis = frequent wet & windy conditions to the UK. Happens every time. Nothing comes good of deep cold over North America - unless you like stormy weather. 

Originally Posted by: idj20 

Depends which side. If the south/west go cold then that could benefit us.


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

Brian Gaze
22 November 2024 18:02:42
UKM is quite interesting next week.

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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

Gandalf The White
22 November 2024 18:09:39

That's easy, it'll only serve to ramp up the north Atlantic jet stream and produce cyclogenesis = frequent wet & windy conditions to the UK. Happens every time. Nothing comes good of deep cold over North America - unless you like stormy weather. 

Originally Posted by: idj20 

It doesn’t necessarily have to evolve like that, it depends on what the jet stream is doing. If it’s dipping south and then driving north towards western Greenland then it can promote WAA. It has happened before, although clearly not a favoured outcome, so not to be dismissed.


Location: South Cambridgeshire

130 metres ASL

52.0N 0.1E



Chunky Pea
22 November 2024 18:12:49

Depends which side. If the south/west go cold then that could benefit us.

Originally Posted by: Quantum 

The broad EC consensus associates this outbreak with increasing heights over the Canadian Maritimes. As others have said, how this may influence NW Europe down the line is up for grabs. 


Patrick,

East Galway, Ireland.

Chunky Pea
22 November 2024 18:29:04

Patrick,

East Galway, Ireland.

Brian Gaze
22 November 2024 18:50:12
Next week continues to look quite interesting to me. UKV shows the snow risk returning to southern and central regions by Wednesday.

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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

Jiries
22 November 2024 19:22:28

Tomorrow is a case in point - the rain will come sweeping in and none of the models have snow in the south, at least on low ground. It's been a long, long time since the last snow-to-rain event down here, the last one I can remember was all the way back in 2005!

As for the 6z GFS, lovely synoptics but just not cold enough... I'd be looking for -10 850s as per usual in a "winds off the North Sea" scenario.

Originally Posted by: Retron 

Oh better still get to -15C because sometimes at -10C we get less cold temperatures and not subzero like before.   Boring out look for now but hope to see something better next month.

nsrobins
22 November 2024 22:39:37
I’ll see your subtle changes and raise you absolute chaos. NWP across the board hasn’t got a scooby about the medium term at the moment.
Neil

Fareham, Hampshire 28m ASL (near estuary)

Stormchaser, Member TORRO

Brian Gaze
22 November 2024 22:40:51
GFS 18Z shows that marginal rain - snow event early next week. I'm keeping an eye on it.

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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

Brian Gaze
22 November 2024 22:42:09
The discussion here has been pretty good recently, but unfortunately I've just had to remove a post. Please stay on topic.
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

Heavy Weather 2013
23 November 2024 05:37:27
0z is fantastic. After Bert, we have a small wedge of HP develop next week. It’s drifts over us and we end up with an MLB which they retrogress’ to Greenland opening the floodgates in FI.

Could be an outlier, but across GFS and other output this persistent attempt to build another high pressure and then retrogress to Greenland is an interesting signal. 

You have to say after the last two days, the next chase is ON.

There is support in GFS ensembles around 240hrs. GEM does appear to also show a rebuild of the GH, but probably a bit to west based for us. 


Mark

Beckton, E London

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

Ally Pally Snowman
23 November 2024 06:15:59

0z is fantastic. After Bert, we have a small wedge of HP develop next week. It’s drifts over us and we end up with an MLB which they retrogress’ to Greenland opening the floodgates in FI.

Could be an outlier, but across GFS and other output this persistent attempt to build another high pressure and then retrogress to Greenland is an interesting signal. 

You have to say after the last two days, the next chase is ON.

There is support in GFS ensembles around 240hrs. GEM does appear to also show a rebuild of the GH, but probably a bit to west based for us. 

Originally Posted by: Heavy Weather 2013 

Yep another good GFS op , it is the best model for picking up pattern changes so hopefully it's the start of something. Long way out still though.


Bishop's Stortford 85m ASL.
Jiries
23 November 2024 07:45:53

Yep another good GFS op , it is the best model for picking up pattern changes so hopefully it's the start of something. Long way out still though.

Originally Posted by: Ally Pally Snowman 

Wondering those extreme mild shots helping us chances to see cold and snow chances this early winter start. I see 14 and 15 tomorrow then drop fast to 6C by Wed as before was showing 10C.  Really hope any charts give me chance to see proper snow events out of blue so to see my wife Xmas lights she put in my garden with snow cover.  

Heavy Weather 2013
23 November 2024 08:03:14

Wondering those extreme mild shots helping us chances to see cold and snow chances this early winter start. I see 14 and 15 tomorrow then drop fast to 6C by Wed as before was showing 10C.  Really hope any charts give me chance to see proper snow events out of blue so to see my wife Xmas lights she put in my garden with snow cover.  

Originally Posted by: Jiries 

I really want snow at Christmas. I’ve never seen a proper white Christmas and it’s such a dream. UK weather always finds a way to not make it happen lol


Mark

Beckton, E London

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

CField
23 November 2024 08:14:05
Mostly mild in USA as we head into December.The weaker polar vortex and mild USA was forecast months ago which really improves our chances of a cold winter .The recurring low pressures in the med region aswell are another positive.If Gfs signals develop this winter is looking special to me ...
Favourite snowstorm

Famous channel low

Dec 31st 1978

Hastings East Sussex

Foot of level snow severe drifting

Next day max temp -4 degrees Celsius

DEW
  • DEW
  • Advanced Member
23 November 2024 08:28:45
WX maps: after a retreat to SE Europe and Turkey in week 1, the cold air over Russia re-asserts itself in week 2, freezing conditions reaching Poland and the Alps, only just above into E France and N Scotland. Cooler in W France and S Britain but close to norm. Pptn in week 1 only really close to the Atlantic but heavy for Britain esp in the NW. Still there but much weaker in week 2 though with some increase in Portugal.

GFS Op 0z: Current developments for  storm Bert, see its own thread. It's out of the way to the NE Wed 27th but leaving a local hang-back 995mb Yorks. Then a brief rise in pressure before an elongated trough sets up down the west coast Sat 30th 995mb, drifting slowly SE, followed by a much stronger rise in pressure 1050mb W Scotland Wed 4th. This hangs around, albeit with some (cold-ish?) E lies for S England until Mon 9th when it departs for Greenland, opening the gates to N-lies under the control of LP 995mb Finland (not yet shown as cold as for recent cold snap).

ECM - like GFS but the 'hang-back' is 995mb English Channel. The trough Sat 30th is there, but is indicated to drift S-wards rather than SE-wards leaving Britain on the edge of continental HP.

GEM - The trough Sat 30th morphs into a zonal W-ly flow with LPs passing over or close to N Scotland and (although it's just past end of run) no indication of incoming HP w/b Mon 2nd

GEFS - briefly very mild, but temp back to norm by Tue 26th, rising again through to Tue 3rd, after which any ens agreement breaks down; mean still near norm but op and control going very cold for a couple of days (control recovers, op doesn't). Plenty of rain, esp in SW, if anything a drier spell around Fri 29th. 


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

Chichester 12m asl

David M Porter
23 November 2024 09:46:42
While there is nothing special currently indicated in the models at the moment, I would say that I have seen worse looking charts in late November plenty of times in recent years for those looking for cold weather. The atlantic seems to be relatively quiet at the moment which is no bad thing. GFS 00z looks interesting as does ECM for a time as well.
Lenzie, Glasgow

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

The Beast from the East
23 November 2024 09:52:52
Anyone have access to the UKMO 168 ? Would like to see if the ridge can hold

https://www.meteociel.fr/ukmo/runs/2024112300/UW144-21.GIF 


Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President

doctormog
23 November 2024 09:58:00

While there is nothing special currently indicated in the models at the moment, I would say that I have seen worse looking charts in late November plenty of times in recent years for those looking for cold weather. The atlantic seems to be relatively quiet at the moment which is no bad thing. GFS 00z looks interesting as does ECM for a time as well.

Originally Posted by: David M Porter 

It wouldn’t surprise me to see a few more eyebrow-raising op runs in the coming days.


Jiries
23 November 2024 10:08:46

Mostly mild in USA as we head into December.The weaker polar vortex and mild USA was forecast months ago which really improves our chances of a cold winter .The recurring low pressures in the med region aswell are another positive.If Gfs signals develop this winter is looking special to me ...

CField wrote:

It need to be mild there as it the only way we can get cold here had New York hit 21c in early Feb 1991 we had -5C here.  Toronto on app looking quite mild same temps as here to less cold temps but no subzero.  Just a while ago they were much milder than here during the gloom spell.

Ally Pally Snowman
23 November 2024 10:16:57

Wondering those extreme mild shots helping us chances to see cold and snow chances this early winter start. I see 14 and 15 tomorrow then drop fast to 6C by Wed as before was showing 10C.  Really hope any charts give me chance to see proper snow events out of blue so to see my wife Xmas lights she put in my garden with snow cover.  

Originally Posted by: Jiries 

We've already got the decorations and lights up earliest we've ever done it. 


Bishop's Stortford 85m ASL.
Jiries
23 November 2024 10:17:10
https://www.wetterzentrale.de/en/show_diagrams.php?geoid=48656&model=gfs&var=201&run=0&lid=ENS&bw=1 

Some possible support for colder early dec.  Even this coming week is been lower to -3C was above 0C other day.   Nicosia ensembes see a sharp drop tomorrow as the cold air what we got here had move to the east Med region so expect maxes above 10C inland.

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