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Brian Gaze
30 November 2020 06:37:04

I deleted the last MO thread but haven't deleted any members yet. Onwards...


Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
ballamar
30 November 2020 06:43:41
GFS seems to give the Atlantic some energy and potential for sliding lows. Midlands north a few wet snow events. Nothing overly cold but should be enough to keep up interest
doctormog
30 November 2020 06:44:20

The end of this week looks intriguing. Will it be a wet and windy mess or is there potential for something a bit more wintry? My hunch is the former for most but the latter for some hills.




Overall the synoptics still look more interesting than the actual resulting weather ma be.


Brian Gaze
30 November 2020 06:51:47


The end of this week looks intriguing. Will it be a wet and windy mess or is there potential for something a bit more wintry? My hunch is the former for most but the latter for some hills.




Overall the synoptics still look more interesting than the actual resulting weather ma be.


Originally Posted by: doctormog 


Looks marginal to me. I expect there will be some snow in the northern half of the UK even down to low levels.


The lack of really cold runs in the GEFS is a bit odd given the synoptics some of the runs show.


https://www.theweatheroutlook.com/twodata/gefs.aspx?run=na&lg=850&lglocation=london&charthour=006&chartname=ps_500hpa&chartregion=na-region&p=1&charttag=PS%20500hPa%20(GPDM)


ECM 00z also keeps some interesting synoptics but can't tap into much cold.



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
Surrey John
30 November 2020 06:55:47
Interesting charts for Friday and Saturday
Low pressure and rather cold air
Could be some winter precipitation in SW and South

http://www.meteociel.fr/modeles/gefs_cartes.php?code=12&ech=96&mode=0&carte= 

http://www.meteociel.fr/modeles/gefs_cartes.php?code=12&ech=120&mode=0&carte= 


Bradford on Avon, Wiltshire
35m ASL
marting
30 November 2020 07:01:32

Some cracking FI charts this morning on GFS with the Greenland high taking the highlights. The control run leading the way! 
Martin


Martin
Greasby, Wirral.
DEW
  • DEW
  • Advanced Member
30 November 2020 07:02:16

GFS - the well-telegraphed LP from the N arriving a day later but deeper and closer (980mb S England Fri 4th), and then retaining more of its identity as it first retreats towards Norway and then comes back a week later Thu 10th on its way to Spain. A long spell of N-lies, but no very cold air so IMO wintry rather than snowy except over hills. After a brief lull, new LP from Atlantic Tue 15th (990mb Irish Sea) with a hint of pressure rises Greenland - N Norway.


GEFS - a long period (all the way to Tue 15th) with mean of runs a couple of degrees below norm, just recovering slightly towards the end, Op and control are amongst the colder members esp around Sat 12th, up to that time there's unusually good agreement. Pptn starts Thu 3rd and continues on and off throughout but with a drier spell midway in the N. Inverness snow row after a brief set of high values settling down to mid-range (ca 10) but only occasional small values further S.


ECM - very close to GFS to Fri 4th but although LP then retreats to Norway, it also fills rapidly. New LP then moves in from N Atlantic to Brittany 990 mb Wed 9th also moving to Spain as above, so again some cold but not very cold N-lies and E-lies at that time.


War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
Shropshire
30 November 2020 07:09:24


Some cracking FI charts this morning on GFS with the Greenland high taking the highlights. The control run leading the way! 
Martin


Originally Posted by: marting 


The ECM doesn't really buy it and we would be heading back to zonality after T240.


From December 27th 2020, zonality will be banned from mixing with the UK. We appreciate that this may come as a shock to younger people and old Uncle Barty. This ban will last for a minimum of ten days.
DEW
  • DEW
  • Advanced Member
30 November 2020 08:02:54


 


Looks marginal to me. I expect there will be some snow in the northern half of the UK even down to low levels.


The lack of really cold runs in the GEFS is a bit odd given the synoptics some of the runs show.


ECM 00z also keeps some interesting synoptics but can't tap into much cold.


Originally Posted by: Brian Gaze 


I agree with Brian. there are some really interesting synoptics which in any other year would give us a memorably wintry December. But there's no nearby source of seriously cold air for the synoptics to tap into.


Still as a believer in the persistence of patterns across a season, the current set up gives me hope if/when it returns in January


War does not determine who is right, only who is left - Bertrand Russell

Chichester 12m asl
David M Porter
30 November 2020 08:21:45


 


The ECM doesn't really buy it and we would be heading back to zonality after T240.


Originally Posted by: Shropshire 


What makes you so sure of that, Ian?


From what I can see, the ECM 240hr chart shows HP moving in from the atlantic after the low to the south of the UK moves away, with an attempt at a link-up between the atlantic HP and the one to the NE. Doesn't look like an almost certain return to zonality to me.


Lenzie, Glasgow

"Let us not take ourselves too seriously. None of us has a monopoly on wisdom, and we must always be ready to listen and respect other points of view."- Queen Elizabeth II 1926-2022
Brian Gaze
30 November 2020 08:22:05

ECM00z op was at the bottom end of the ensemble after Dec 5th. Fits in with the earlier comments about GEFS and the possibility of snow mainly in the northern half of the UK.



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
nsrobins
30 November 2020 08:22:35
Without be too technical the headlines this morning are:
1) first dropping trough/low nudged further east - raised risk of snow in west/NW late week
2) new change - another low to follow dropping SE with Easterlies to follow but not a huge amount of CAA to play with

I’m guessing some upland areas (Wales/Moors) could see a lot of snow by the weekend.
Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Shropshire
30 November 2020 08:23:27


 


What makes you so sure of that, Ian?


From what I can see, the ECM 240hr chart shows HP moving in from the atlantic after the low to the south of the UK moves away, with an attempt at a link-up between the atlantic HP and the to the NE. Doesn't look like an almost certain return to zonality to me.


Originally Posted by: David M Porter 


David the mean also suggests a collapsing of heights later on, we would need low pressure to sustain over Europe to even maintain a mid latitude High should that chart come to fruition.


From December 27th 2020, zonality will be banned from mixing with the UK. We appreciate that this may come as a shock to younger people and old Uncle Barty. This ban will last for a minimum of ten days.
Brian Gaze
30 November 2020 08:28:02

This GEFS p jumped out at me:



But look at 850s across Europe!



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
Gooner
30 November 2020 09:06:38


The Control is on the cold side of the ENS but you'd take that 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gandalf The White
30 November 2020 09:07:29


 


David the mean also suggests a collapsing of heights later on, we would need low pressure to sustain over Europe to even maintain a mid latitude High should that chart come to fruition.


Originally Posted by: Shropshire 


This post doesn’t even make sense, not to mention that it doesn’t even reflect the ECM output.


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Gooner
30 November 2020 09:09:26

From the OP , this isn't to be sniffed at either 




Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


David M Porter
30 November 2020 09:18:49


 


This post doesn’t even make sense, not to mention that it doesn’t even reflect the ECM output.


Originally Posted by: Gandalf The White 


Yes, my thoughts as well, Peter.


I sometimes wonder if Ian is looking at the same model output as the rest of us are looking at!


Lenzie, Glasgow

"Let us not take ourselves too seriously. None of us has a monopoly on wisdom, and we must always be ready to listen and respect other points of view."- Queen Elizabeth II 1926-2022
Shropshire
30 November 2020 09:34:22


This GEFS p jumped out at me:



But look at 850s across Europe!



Originally Posted by: Brian Gaze 


 


Yes astonishing warmth across Europe - as I said yesterday remove the date and one would guess the chart was early October.


From December 27th 2020, zonality will be banned from mixing with the UK. We appreciate that this may come as a shock to younger people and old Uncle Barty. This ban will last for a minimum of ten days.
ballamar
30 November 2020 09:59:07
End of the week could see some decent snowfall in Wales - always good to see some snowfall early December.
Gandalf The White
30 November 2020 10:03:26


 


 


Yes astonishing warmth across Europe - as I said yesterday remove the date and one would guess the chart was early October.


Originally Posted by: Shropshire 


Southerly flow all the way from North Africa. Not really 'astonishing' is it?


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Rob K
30 November 2020 10:04:07


 


 


Yes astonishing warmth across Europe - as I said yesterday remove the date and one would guess the chart was early October.


Originally Posted by: Shropshire 


Is the warmth really that remarkable? Running through the latest GFS run most of western and southern Europe has negative T850 anomalies for virtually the entire run. Further east the anomalies turn positive.


 


Meteociel - Cartes du modèle numérique GFS pour l'Hémisphère Nord


 


The greatest positive anomalies are over northern Canada - up to 25C above average over the coming days!


 


ECM shows similar anomalies - cooler than average in the west (including UK), warmer than average in the east. Meteociel - Modèle Numérique ECMWF CEP


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
doctormog
30 November 2020 10:04:58


 


 


Yes astonishing warmth across Europe - as I said yesterday remove the date and one would guess the chart was early October.


Originally Posted by: Shropshire 


What you actually said was NE Europe?


Gooner
30 November 2020 10:07:05


 


 


Yes astonishing warmth across Europe - as I said yesterday remove the date and one would guess the chart was early October.


Originally Posted by: Shropshire 


And that is the 7th warmest out of the ENS so I'd ignore that if I was you , so its on the high side and at that distance its a JFF comment , not to say it can't happen of course 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
30 November 2020 10:11:30

Someone will be happy 


Chart image#


Chart image


Chart image


Chart image


In fact many could be very happy 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


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