Jiries
11 January 2023 20:13:50
Originally Posted by: doctormog 

Happy birthday in advance and yes it’s worth keeping an eye out for the risk of snow for your birthday. Even in Aberdeen I’ve never had snow on my birthday which is disappointing…but then again my birthday is in July. 🤡

Anyway brief summary of the models’ output this evening cooler and unsettled then milder and potentially more settled, with all the usual caveats given the time scales. This is backed up by the 12z ECM ensemble data.



Thanks a lot and it a bit scary to be at 50 and only few memories of snow events in here so need to make up by going abroad where snow still exist to fill up my memories more on snow like a typical N American person.   Could need some settled weather as drought had been over since October here last year and already too wet.  
Saint Snow
11 January 2023 21:48:42
Originally Posted by: Matty H 

Works the other way as well for some of those hilariously looking for cold all the time. Of course they are never pulled to task about it. They’re seen as good eggs. 

jff



'Coldies' don't generally announce with  certainty that it will become cold. 

As Doc repeatedly points out, with unerring patience, the models have been showing uncertainty, the Ensembles a lot of scatter. So the couple of people that constantly make 'it's going to turn mild/zonal from ###' posts are really not basing their comments on the model output. 

Their motives for doing so are whatever they are. 

But it's so tiresome. 

Martin
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
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Brian Gaze
11 January 2023 21:51:27
Originally Posted by: Jiries 

They put snow on my 50th Birthday on 16th Jan, even if a brief one at least to see snowfall on my day then a bit colder on Tuesday but dry then jump back to above average so heating costs will not be high as last month.



Happy birthday! I always hope for snow on my birthday.
Brian Gaze
Berkhamsted
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Saint Snow
11 January 2023 22:28:07
I've had snow on my birthday (30th Jan) a few times.

😀

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
ballamar
12 January 2023 05:04:03
Old one seems to have disappeared!

GFS looks blocked on this run post cold NW blast. 
doctormog
12 January 2023 06:09:49
The output look based on the 00z runs (so far) continues the recent pattern of colder and unsettled conditions in the short to medium term and then probably something more settled beyond that.
Ally Pally Snowman
12 January 2023 06:14:01
Yep cold spell still on 15th to 20th. NW looks like doing well snow wise. After that probably mild returns perhaps very mild.
Bishop's Stortford 85m ASL.
Caz
  • Caz
  • Advanced Member
12 January 2023 06:16:20
Originally Posted by: Saint Snow 

I've had snow on my birthday (30th Jan) a few times.

😀

So have I, 23rd January, followed by ‘ooh, snow on your birthday’ messages from those who know me well.  But more often than not, it rains!  🙄
Market Warsop, North Nottinghamshire.
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Ally Pally Snowman
12 January 2023 06:17:29
Looks like the GEFS want to extend the cold spell to the 22nd now.

https://www.wetterzentrale.de/en/show_diagrams.php?geoid=50893&model=gfs&var=2&run=0&lid=ENS&bw=1 
 
Bishop's Stortford 85m ASL.
Brian Gaze
12 January 2023 06:50:51
Not sure what happened, but I've merged the threads now. 
Brian Gaze
Berkhamsted
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Ally Pally Snowman
12 January 2023 07:13:28
Massive strat warming too this morning on the GFS. 

https://content-eu.invisioncic.com/d321955/monthly_2023_01/image.png.41517749e7cad1861afc60cbddf86d27.png 
 
Bishop's Stortford 85m ASL.
scillydave
12 January 2023 07:43:46
Interesting to see such very big changes in the very short term. Today's forecast widespread heavy rain for Wales and the Southwest has all but gone from the forecast. Thank god it wasn't supposed to be snow!
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.
DEW
  • DEW
  • Advanced Member
12 January 2023 07:52:30
Originally Posted by: scillydave 

Interesting to see such very big changes in the very short term. Today's forecast widespread heavy rain for Wales and the Southwest has all but gone from the forecast. Thank god it wasn't supposed to be snow!



The MetO haven't stood down their warning yet
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Brian Gaze
12 January 2023 07:56:59
Looks like the GFS is having a go at splitting the SPV.

UserPostedImage


The op run was something of an oddball though.

UserPostedImage

The 35 day charts look less interesting, although they are 24 hours older.

https://www.theweatheroutlook.com/atmosphere/stratosphere 

 
Brian Gaze
Berkhamsted
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Whiteout
12 January 2023 07:57:05
Originally Posted by: scillydave 

Interesting to see such very big changes in the very short term. Today's forecast widespread heavy rain for Wales and the Southwest has all but gone from the forecast. Thank god it wasn't supposed to be snow!



Have you looked out of the window lol, it is chucking it down here. 🙄
Home/Work - Dartmoor
240m/785 ft asl

Winter 22/23:

Snow falling days - 3
Snow lying days - 3
Brian Gaze
12 January 2023 08:02:05
Originally Posted by: Whiteout 

Have you looked out of the window lol, it is chucking it down here. 🙄



My basic guidelines for current weather are radar trumps models and window trumps radar.
Brian Gaze
Berkhamsted
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MBrothers
12 January 2023 08:02:35
Originally Posted by: Whiteout 

Have you looked out of the window lol, it is chucking it down here. 🙄

yeah here in Newquay it’s been chucking it down for hours. Lots more to come
DEW
  • DEW
  • Advanced Member
12 January 2023 08:39:32
WX charts - colder weather trickling into W Europe in week 2, but counterbalanced by warmth in the E moving N from the Black Sea. Rain on Atlantic coasts and up into the Baltic (probably snow there) in week 1 replaced by rain in the E Med while the Atlantic pptn removes itself up to Iceland.

GFS Op - zonal to start with, but the LPs on increasingly S-ly tracks (Fri 13th and Sun 15th in northern N Sea), eventually by Wed 18th 960mb E Scotland having pulled down a lot of Arctic air to cover Britain. But that fills and drifts E-wards as ridge of HP develops from the SW becoming a large area of HP centred 1035mb over Britain Fri 27th

ECM - has similarities to GFS but on Wed 18th the area of LP is further E and S (990mb Sweden and W Germany) so W Britain escapes the worst of the Arctic. That LP also fills more quickly, and the HP sets up much earlier, 1040mb Baltic Sun 22nd, with Scotland under SW-lies and England under SE-lies

GEFS - temps generally decreasing with bursts of rain in the coming week, to become cold and somewhat drier from 17th -22nd Jan, after which agreement between ens members breaks down, some runs showing rain and some not (but many wetter later on in W), temp range  at  various stations on 26th Jan from 10C above mean to 15C below. Snow row figures typically in 20s in Scotland around the 18th, in the teens even in the far S.
War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Whiteout
12 January 2023 08:40:44
Originally Posted by: MBrothers 

yeah here in Newquay it’s been chucking it down for hours. Lots more to come



Looks like it won't be long before it clears North Coast and hopefully by lunchtime here 🤞
Home/Work - Dartmoor
240m/785 ft asl

Winter 22/23:

Snow falling days - 3
Snow lying days - 3
UncleAlbert
12 January 2023 09:53:48
Originally Posted by: Ally Pally Snowman 

Looks like the GEFS want to extend the cold spell to the 22nd now.

https://www.wetterzentrale.de/en/show_diagrams.php?geoid=50893&model=gfs&var=2&run=0&lid=ENS&bw=1 
 



Yes, quite a bit of spread between the 19th and 22cnd for a topling scenario. MOGREPS seems to be going along similar lines.

https://www.theweatheroutlook.com/charts/mogreps/mogreps850london.png 

ECM is keener on a shorter colder spell though.  Though main models display a strong signal for milder from the 22cnd onwards it seems to be a question of how HP dominated it then becomes and where any High cells position themselves.

 
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