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roger63
02 February 2015 09:06:15


It's got to the stage that one only has to take a look at the GFS ENS set:


http://www.meteociel.fr/cartes_obs/gens_display.php?ext=1&x=306&y=141&ville=Londres


Moderated brief easterly flow now later this week, then almost complete agreement of raised uppers into FI. Borefest for snow chances, winter of sorts will drag on under high pressure


Originally Posted by: nsrobins 


Agree.The model output currently seems to be pretty close to delivering   the METO extended forecast.Not saying it could n't change but no sign of any real northern blocking at present.

Whether Idle
02 February 2015 09:35:05


 


Agree.The model output currently seems to be pretty close to delivering   the METO extended forecast.Not saying it could n't change but no sign of any real northern blocking at present.


Originally Posted by: roger63 


I think it is all about where the block sits.  The further N and W then there's more cold weather for most, especially the further S and E.


Here's the CMA for Feb 11th:



Heres the NAVGEM for Feb 9th:



Both offer cold weather for many.  All part of the many possibilities depending upon where the high locates.


Dover, 5m asl. Half a mile from the south coast.
Russwirral
02 February 2015 10:00:22

I havent seen the Snow row look this barren since about November:


 


No chart available for the selected hour. Many charts start at 3 hours ahead, so if you have 0 hours selected try stepping forward or selecting a later hour.


 


And so ends a cold spell that really hasnt delivered for us at all.  Apart from the odd heavy hail shower -and the two snow showers we had.  Quite sad for us really as we have had some really cold days when it was dry.


 


Fingers crossed the HP doesnt sit too close to the UK, and takes up situ over the north of the UK towards Iceland.


 


 edit: US = Merseyside/parts of North West England.


Whether Idle
02 February 2015 10:01:50

6z GFS has a plunge of cold air into the SE Thursday with widespread snow flurries across England and perhaps something heavier grazing the SE coast:



Dover, 5m asl. Half a mile from the south coast.
SnowyHythe(Kent)
02 February 2015 10:08:34
Yes, WI, the 06z is an improvement and if those charts verified I'd be confident in a stream of showers piling in from the NE..
The Beast from the East
02 February 2015 10:16:56

slight correction north boosts the snow risk in the SE, hope for another correction on the next run. Of course, could go the other way as well


 


"We have some alternative facts for you"
Kelly-Ann Conway - special adviser to the President
Whether Idle
02 February 2015 10:17:37

Yes, WI, the 06z is an improvement and if those charts verified I'd be confident in a stream of showers piling in from the NE..

Originally Posted by: SnowyHythe(Kent) 


Hi, I wouldn't be overly confident of any great volume of showers...any possible accumulations look pretty small to me... but at least this run is probably representative of the GEFS suite, unlike the outlier 0z, and it shows that Thursday is the day where some convective snow showers are most likely across  England especially the far SE.


Dover, 5m asl. Half a mile from the south coast.
The Beast from the East
02 February 2015 10:19:17

ok, current cold spell over by Saturday but now we want our high to be sucked west


 


"We have some alternative facts for you"
Kelly-Ann Conway - special adviser to the President
Scandy 1050 MB
02 February 2015 10:41:40


ok, current cold spell over by Saturday but now we want our high to be sucked west


 


Originally Posted by: The Beast from the East 


Latest GFS run having none of ECM's westward movement, it's back to the sinker as we had on the early run on Sunday:


http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=216&mode=0


 


 


 

nsrobins
02 February 2015 11:05:26


 


Latest GFS run having none of ECM's westward movement, it's back to the sinker as we had on the early run on Sunday:


http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=216&mode=0


 


 


 


Originally Posted by: Scandy 1050 MB 


And according to the 00Z GEFS there was a 95% probability it would sink. Those citing CMA this morning are clutching one of only a few straws left in the basket I'm afraid.


Yes the MLB could shift into HLB but we're going to need a lot of luck to get it high enough North for the cold plunge to our east to influence us in any way next week.


All the best for Thursday for those in the SE, but as it stands it's a blink and you'll miss it affair.


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Stormchaser
02 February 2015 11:05:43

The models continue to disagree on how amplified the pattern will be days 5-6, with ECM at the upper end and GFS the lower.


A classic standoff, and the first regarding a strong, cut-off HP cell west of the UK in a long time. The ECM version in particular takes me back to the often dry years of 2010 and 2011, when such features were frequent and talk of drought was never too far away. That has seemed like a whole other world these past few years!


 


Anyway, the main interest in terms of surface weather today looks to be across Devon and Cornwall this evening in the form of a few heavy snow showers, with the chance of a dusting as far east as Bournemouth based on the most recent high-res model runs, of which roughly half snow a small feature heading south having developed in the vicinity of Bristol. Too specific and small-scale to take literally I'm afraid!


Tomorrow could bring a disturbance or two in the flow from the NE that track across SE England but just how far SE is total guesswork, with no two models agreeing. There's the potential for a cm or two for a lucky few.


 


Thursday now has the greatest potential to bring more widespread snow - though again, focused across England - thanks to the Euro trough looking a bit stronger on the latest runs.


This introduces a bit more moisture and instability into the cold easterly, which combined with uppers of -10*C running over SSTs of 6-10*C gives some scope for a convective feature to develop. I imagine Quantum will have more details on that as we draw closer to the day.


 


Briefly on the longer range, there seems to be issues (from an interesting weather perspective) with the atmosphere falling into a low momentum state at time when there is extensive high pressure across the UK, which could leave us high and dry for a very long time... unless the polar vortex splits or there is a sudden burst of westerly momentum to drive the Atlantic through to our shores.


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Keep Calm and Forecast On
idj20
02 February 2015 11:20:37

St Valentines garden BBQs, anyone?



Of course, it is a million miles away in forecasting terms and would probably result in anticyclonic gloom if this rang true - but it is a completely different outlook on that day last year when a 955 mb low pressure system sliced through the middle part of the UK.

Come to think of it, whose idea was it to put Valentine's Day on what is the most wintry part of the year anyway? That must make it hard for people to "get into the mood" for it. I would have thought the middle part of June would be more ideal.


Folkestone Harbour. 
Saint Snow
02 February 2015 11:27:46


Come to think of it, whose idea was it to put Valentine's Day on what is the most wintry part of the year anyway? That must make it hard for people to "get into the mood" for it. I would have thought the middle part of June would be more ideal.


Originally Posted by: idj20 


 


There is a certain romanticism in snuggling up with your partner and warming each other up, though.




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
nsrobins
02 February 2015 11:28:47


St Valentines garden BBQs, anyone?



Of course, it is a million miles away in forecasting terms and would probably result in anticyclonic gloom if this rang true - but it is a completely different outlook on that day last year when a 955 mb low pressure system sliced through the middle part of the UK.

Come to think of it, whose idea was it to put Valentine's Day on what is the most wintry part of the year anyway? That must make it hard for people to "get into the mood" for it. I would have thought the middle part of June would be more ideal.


Originally Posted by: idj20 


As has been said millions of times, it won't be warm at the surface under that. A classic inversion, stagnant surface air will stay cold/cool for days. If nights are clear you'll have fog and frost, but if cloudy it's a total borefest I'm afraid.


Those pinning hopes on the ECM should note the OP was much colder than the mean Day 7, which would indicate the OP will fall into line with GFS probably later.

It's Groundhog Day and it feels like it


 


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Jonesy
02 February 2015 11:30:25


 


 


There is a certain romanticism in snuggling up with your partner and warming each other up, though.



Originally Posted by: Saint Snow 


I find keeping my socks on helps 


Rain/Snowfall EURO4 Tu 03.02.2015 00 GMT


Rain/Snowfall EURO4 Tu 03.02.2015 06 GMT


 


Some interest for the SE but more so for East Anglia from the Euro4 I see 


Medway Towns (Kent)
The Weather will do what it wants, when it wants, no matter what data is thrown at it !
Saint Snow
02 February 2015 11:36:07

 


As has been said millions of times, it won't be warm at the surface under that. A classic inversion, stagnant surface air will stay cold/cool for days. If nights are clear you'll have fog and frost, but if cloudy it's a total borefest I'm afraid.


Originally Posted by: nsrobins 


 


It's a perfect set-up for AFTER you've got a good dumping of snow in the ground (I do love a bit of anticyclonic gloom when there's snow on the ground)


Just a pity that very, very few of us have a good dumping of snow lying on the ground



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
idj20
02 February 2015 11:39:47


 


As has been said millions of times, it won't be warm at the surface under that. A classic inversion, stagnant surface air will stay cold/cool for days. If nights are clear you'll have fog and frost, but if cloudy it's a total borefest I'm afraid.


Those pinning hopes on the ECM should note the OP was much colder than the mean Day 7, which would indicate the OP will fall into line with GFS probably later.

It's Groundhog Day and it feels like it


 


Originally Posted by: nsrobins 



And indeed, that may well be true come the moment (if that output verified).

Having said that, what's the betting that we will never, ever get to see those kind of synoptics come high summer?


Folkestone Harbour. 
nsrobins
02 February 2015 11:42:18




And indeed, that may well be true come the moment (if that output verified).

Having said that, what's the betting that we will never, ever get to see those kind of synoptics come high summer?


Originally Posted by: idj20 


LOL Ian - I think you can pretty much guarantee come Summer it's a southerly jet and cool and wet all the way.


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Quantum
02 February 2015 11:49:45

Some of these charts come close to breaking the all time high pressure record for the UK of 1054mb


2023/2024 Snow days (approx 850hpa temp):
29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)

Total: 8 days with snow/sleet falling.

2022/2023 Snow days (approx 850hpa temp):

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

Total: 7 days with snow/sleet falling.

2021/2022 Snow days (approx 850hpa temp):

26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)
Total: 12 days with snow/sleet falling.
hobensotwo
02 February 2015 12:20:26


Some of these charts come close to breaking the all time high pressure record for the UK of 1054mb


Originally Posted by: Quantum 


Interesting, good time to set the barometer then.


Was that record set in the summer?

The Beast from the East
02 February 2015 12:33:44

Some interesting GEFS members longer term with another atlantic ridge showing on some


 


"We have some alternative facts for you"
Kelly-Ann Conway - special adviser to the President
Gavin P
02 February 2015 13:36:57

Hi all,


Here's today's main video update;


High Pressure All The Way;



Looking like HP is in for the forseeable future.


Rural West Northants 120m asl
Short, medium and long range weather forecast videos @ https://www.youtube.com/user/GavsWeatherVids
four
  • four
  • Advanced Member
02 February 2015 13:39:45


 


 


Was that record set in the summer?


Originally Posted by: hobensotwo 



Winter anticyclones are often the most intense but not quite sure why - unless it's as simple as cold air is heavier.


sizzle
02 February 2015 13:43:21

thanks gav and TBH today has been like a early spring like day sunny and a bit chilly, bye winter its been emotional, shame it could not deliver, here in Essex,

Solar Cycles
02 February 2015 13:54:18

The outlook continues to show lots of potential.


Tumbleweed

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