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Retron
10 January 2024 12:37:16
A truly historic set of 6z GEFS!

...as that has to be one of the biggest outliers I've ever seen at the end of a run.

https://images.meteociel.fr/im/88/3735/graphe_ens3fdx3.php.gif 

UserPostedImage
Leysdown, north Kent
Quantum
10 January 2024 12:38:07

I wonder how often that has happened in the last 50 years? Deep snow blanketing virtually the whole of the UK is rare. 

Originally Posted by: Brian Gaze 



Might not be concurantely though. My criteria allows for transient periods of snow across more southern areas too. That being said, deep snow across most of the UK is an optimistic end, yet definitely possible outcome here.
 
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.
Joe Bloggs
10 January 2024 12:45:13

I guess I'm alone in being rather underwhelmed this morning 🤨

The big snow from the SW showing yesterday for a swathe of the country  - most importantly, MBY - has gone.

I've been through too many winter events where people to the north, south, east and west delight in their snow and this region is either dry or gets a pretty pointless cm or so.

This smacks of one of those.
 

Originally Posted by: Saint Snow 



Couldn’t disagree more.

The 06z GFS is a million times better for our patch than the output from previous days. Why? A genuine Arctic NW’ly. 

I know I am biased given my location compared to yours, but those setups shown yesterday rarely verify. They either go too far south, fizzle out, or large parts of the region (my bit 😬🤣) stay dry. Or it all comes too far north and we’re swamped with mild air. I know Jan 2013 was brilliant for you, and I get that. 

Let’s get the cold air as far south as possible and for as long as possible, and let’s have the flow back NW’ly. 

This is a dream setup for us Saint - those uppers are below -10C. 

https://www.wetterzentrale.de/maps/GFSOPEU06_168_1.png 

I know a frontal event would be amazing if it works out, but remember how good December 2009 was ? 

 

Manchester City Centre, 31m ASL

Brian Gaze
10 January 2024 12:49:39

Might not be concurantely though. My criteria allows for transient periods of snow across more southern areas too. That being said, deep snow across most of the UK is an optimistic end, yet definitely possible outcome here.
 

Originally Posted by: Quantum 



Fair enough. 👍 when I lived in York in the 1980s it was often the case that there was disruptive to the south, east and north!
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
10 January 2024 12:58:32

Might not be concurantely though. My criteria allows for transient periods of snow across more southern areas too. That being said, deep snow across most of the UK is an optimistic end, yet definitely possible outcome here.
 

Originally Posted by: Quantum 



I agree with Saint, its looking very dry, with any LP delivering any precip bumped to the fringes of the UK.

Of course it will be cold, we will be stuck under HP most of the time.  From what I can see, the block wont be to the north or East, it will be over the UK.  It just doesnt explicitly say it in the charts currently.

Unless we start to see a move away from HP cells dominating, I fear this could go down an even drier outlook than whats being forecast.

 
Tim A
10 January 2024 12:59:04

Fair enough. 👍 when I lived in York in the 1980s it was often the case that there was disruptive to the south, east and north!

Originally Posted by: Brian Gaze 



Might be wrong but I am not sure York has had disruptive snow since Feb 2012! 
Tim
NW Leeds
187m asl

 My PWS 
Joe Bloggs
10 January 2024 13:02:20

Hope you're right, but I'm sceptical - especially for the big Gtr Manchester/Liverpool/Cheshire/West Lancs conurbation (away from the Pennines/Peak)

Originally Posted by: Saint Snow 



You’re absolutely right to be sceptical , but if charts like this verify (still uncertain) , we could be the snowiest part of England.

https://www.wetterzentrale.de/maps/GEMOPEU00_192_1.png 

Manchester City Centre, 31m ASL

Joe Bloggs
10 January 2024 13:06:27

I agree with Saint, its looking very dry, with any LP delivering any precip bumped to the fringes of the UK.

Of course it will be cold, we will be stuck under HP most of the time.  From what I can see, the block wont be to the north or East, it will be over the UK.  It just doesnt explicitly say it in the charts currently.

Unless we start to see a move away from HP cells dominating, I fear this could go down an even drier outlook than whats being forecast.

 

Originally Posted by: Russwirral 



If winds stay due northerly; then yes.

If they back NW’ly, or veer NE’ly - snow will move inland. 

Manchester City Centre, 31m ASL

Bertwhistle
10 January 2024 13:23:12
6z GEFS suite offering 15 in snow row for 18th.
Same run puts the Op as a low outsider later on.
Bertie, Itchen Valley.
Retire while you can still press the 'retire now' button.
10 January 2024 13:27:54

I know many people might be dissapointed in the details, but I have never seen such robust, broad and iron clad agreement for a cold spell before I don't think.

Originally Posted by: Quantum 



2018 BFTE, all models were totally solid for days. The best model run watch ever.
Berkshire
Joe Bloggs
10 January 2024 13:28:09
My best guess at present based on the 06z GFS run. 

Sunday - very cold northerly arrives. Snow showers for the usual suspects (north facing coasts)

Monday - pressure builds slightly and winds fall lighter, slightly less cold. Snow showers continue near exposed coasts but perhaps turning to sleet. 

Tuesday - turning colder as the day goes on. Band of rain and sleet with snow on the back edge moving south through Scotland and Northern England. All snow on high ground. Winds back NW’ly and heavy snow showers then push into Western Scotland, North Wales, NI and perhaps NW England/NW Midlands overnight. 

Wednesday - even colder. Snow showers in many northern and western areas giving a covering in places. Snow showers becoming more organised towards the end of the day as winds back more WNW’ly. Perhaps a band of
more organised snow into NW Scotland, with the threat of heavy snow into the far SW of England and the Channel Islands. 

No point going any further than that  

The 06z also has to verify  😉 



 

Manchester City Centre, 31m ASL

Gandalf The White
10 January 2024 13:29:56

I agree with Saint, its looking very dry, with any LP delivering any precip bumped to the fringes of the UK.

Of course it will be cold, we will be stuck under HP most of the time.  From what I can see, the block wont be to the north or East, it will be over the UK.  It just doesnt explicitly say it in the charts currently.

Unless we start to see a move away from HP cells dominating, I fear this could go down an even drier outlook than whats being forecast.

 

Originally Posted by: Russwirral 



It was ever thus: whether it’s a northerly or an easterly, inland areas away from a moisture source tend to be bone dry and depend on troughs or frontal systems to deliver sleet and snow. Quite often that’s at the end of the cold spell when milder air is pushing in; rarely that push is repelled. 
Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Saint Snow
10 January 2024 13:44:46

My best guess at present based on the 06z GFS run. 

Sunday - very cold northerly arrives. Snow showers for the usual suspects (north facing coasts)

Monday - pressure builds slightly and winds fall lighter, slightly less cold. Snow showers continue near exposed coasts but perhaps turning to sleet. 

Tuesday - turning colder as the day goes on. Band of rain and sleet with snow on the back edge moving south through Scotland and Northern England. All snow on high ground. Winds back NW’ly and heavy snow showers then push into Western Scotland, North Wales, NI and perhaps NW England/NW Midlands overnight. 

Wednesday - even colder. Snow showers in many northern and western areas giving a covering in places. Snow showers becoming more organised towards the end of the day as winds back more WNW’ly. Perhaps a band of
more organised snow into NW Scotland, with the threat of heavy snow into the far SW of England and the Channel Islands. 

No point going any further than that  

The 06z also has to verify  😉 



 

Originally Posted by: Joe Bloggs 




You double-dosed on the prozac this morning?

😁

The way I see the GFS 6z is:

Tuesday - snow-bearing front moving south over Scotland into northern England but fizzling out as it does so, as pressure builds from the west. Very fragmented by the time it reaches the Gtr Manchester/Merseyside/Cheshire area, giving just very patchy, light snizzle.

Wednesday - pressure too high over western England for showers, but plenty of snow showers over Scotland. Further south, a Channel low gives snow to southern areas.


Some of the charts yesterday - excluding GFS - were amazingly snowy for a band between the south Midlands up to around the Ribble-Tees line.

I want those back!!!  😊😆😊

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
Joe Bloggs
10 January 2024 13:59:16

You double-dosed on the prozac this morning?

😁

The way I see the GFS 6z is:

Tuesday - snow-bearing front moving south over Scotland into northern England but fizzling out as it does so, as pressure builds from the west. Very fragmented by the time it reaches the Gtr Manchester/Merseyside/Cheshire area, giving just very patchy, light snizzle.

Wednesday - pressure too high over western England for showers, but plenty of snow showers over Scotland. Further south, a Channel low gives snow to southern areas.


Some of the charts yesterday - excluding GFS - were amazingly snowy for a band between the south Midlands up to around the Ribble-Tees line.

I want those back!!!  😊😆😊

Originally Posted by: Saint Snow 



No! Just 50mg of sertraline these days! 😊

I stand by my analysis of the charts (GFS 06z op). I think you are under-egging the potential and the depth of cold but if I am wrong then fair enough. 

https://www.wetterzentrale.de/maps/GFSOPEU06_162_2.png 

Manchester City Centre, 31m ASL

Heavy Weather 2013
10 January 2024 14:29:43

No! Just 50mg of sertraline these days! 😊

I stand by my analysis of the charts (GFS 06z op). I think you are under-egging the potential and the depth of cold but if I am wrong then fair enough. 

https://www.wetterzentrale.de/maps/GFSOPEU06_162_2.png 

Originally Posted by: Joe Bloggs 



I think it’s also just scarring. While we have been rewarded, too often things go wrong. 

Anyways, I’m sure the 12z GFS will throw a terrible run and the scatter will be back again to throw us off.
Mark
Beckton, E London
Less than 500m from the end of London City Airport runway.
Joe Bloggs
10 January 2024 14:42:44

I think it’s also just scarring. While we have been rewarded, too often things go wrong. 

Anyways, I’m sure the 12z GFS will throw a terrible run and the scatter will be back again to throw us off.

Originally Posted by: Heavy Weather 2013 



Haha I’m genuinely trying to be objective/realistic. The cold on offer from the north (as Darren has alluded to) is well, to put it plainly, very very cold. Colder than usual. 

Past experience suggests that as soon as a northerly flow changes direction to a NW’ly or NE’ly, snow showers form readily and push inland. Features and troughs make an appearance - especially when heights are low and the air so cold at the 850 hPa level. This always happens, no matter what the apps or precipitation charts say.

The 06z GFS was an especially good run though, I agree the 12z probably won’t be as cold. 

Manchester City Centre, 31m ASL

Lionel Hutz
10 January 2024 15:02:30

I think it’s also just scarring. While we have been rewarded, too often things go wrong. 

Anyways, I’m sure the 12z GFS will throw a terrible run and the scatter will be back again to throw us off.

Originally Posted by: Heavy Weather 2013 



I know that I'm tempting fate but I am fairly confident about this cold spell(although I have no idea yet as to how much snow it will bring nor where that snow will fall). The UK Met Office seems to be very confident to the extent that the possibility of disruptive snow next week was mentioned on the R4 weather forecast at 7.55 this morning - that show a large degree of certainty in the UK Met Office about the upcoming cold spell.

As for snow, I would be delighted if we see a decent fall. However, if not, I am enjoying and will continue to enjoy this cold spell with temperatures in low single figures by day and frosts at night. Snow or not, that's better than mild dross any day. 

But I do share your pain of years of letdowns from the weather gods! 
Lionel Hutz
Nr.Waterford , S E Ireland
68m ASL



fairweather
10 January 2024 15:10:56

Doh! Lol 🤣

If we can get some decent snow on the ground then get  Scandi high that really would be dreamland. 
 

Originally Posted by: Ally Pally Snowman 


.................... and some decent frosts in this "mild spell" to prepare the ground for the snow 😀
S.Essex, 42m ASL
Ally Pally Snowman
10 January 2024 15:11:48
No change in today's met office update.  Still suggesting good chance of a high impact snow event somewhere next week.  Will the GFS 12z bring it back?
Bishop's Stortford 85m ASL.
Joe Bloggs
10 January 2024 15:17:59

No change in today's met office update.  Still suggesting good chance of a high impact snow event somewhere next week.  Will the GFS 12z bring it back?

Originally Posted by: Ally Pally Snowman 



Hopefully not 🤣🤣🤣🤣. Send those lows way south! 

Manchester City Centre, 31m ASL

Joe Bloggs
10 January 2024 15:30:11
Before the madness of the 12z runs - worth pointing out that this chart at this specific timeframe gave parts of Northern England its biggest snowfall in living memory.

https://www.wetterzentrale.de/maps/archive/2010/cfsr/CFSR_1_2010010500_1.png 

At first glance it looks quite benign, and if it was shown in the current output it may well be claimed by some as looking generally dry. 

With a strong depth of cold - don’t underestimate the possibility of notable convection and troughs. Some of the charts in the outlook look similar to the above. Not identical, but a similar depth of cold/instability.  

Anyway - I have said my piece and will now get back in my box. The 12z runs may well tone things down. 
 

Manchester City Centre, 31m ASL

Joe Bloggs
10 January 2024 15:36:05
12z ICON.

Exhibit A ^^^^^^

https://www.wetterzentrale.de/maps/ICOOPEU12_168_1.png 

 

Manchester City Centre, 31m ASL

Retron
10 January 2024 15:36:59
Talking of the 12z runs, here's the ICON. It brings heavy rain south on Tuesday, then there's a bit of snow for the Pennines and a few other areas in England - nothing massive, though, despite the very low 500hPa heights.

I would expect more "pop up" showers in the flow than it's showing at the moment, although admittedly I don't know as much about northerlies as I do about easterlies! 😁

The 12z ICON is very consistent with its 0z output, at least in terms of the overall pattern.

https://images.meteociel.fr/im/2/24711/icon_0_177zkh6.png 
UserPostedImage
Leysdown, north Kent
ballamar
10 January 2024 15:37:16
ICON gets the models off to a flyer !
Ally Pally Snowman
10 January 2024 15:47:44

ICON gets the models off to a flyer !

Originally Posted by: ballamar 



No sign of the high impact snow event though.
Bishop's Stortford 85m ASL.

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