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Quantum
16 December 2015 17:03:47

By 384 hours the Alaskan part of the polar vortex seems to have gone, and the vortex is now centered actually over Greenland. Note you can still see some of the debris in the middle east from when it got cut off earlier! 



Although to a certain degree it seems to have intensified again, it has been displaced to the south which is interesting. Note this is also the case at much higher levels including the stratospheric polar vortex. Note the tropospheric polar vortex is a 'thing', as far as I'm aware the lowest part is indeed the 500hpa level which is what I am looking at now. Anyway at the 10mb level:



We see some of this displacement south mirrored. What I think this means in practice is the potential for LPs to move on more southerly courses than usual which does mean we could be potentially on the cold side come January! 


 


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.
Fothergill
16 December 2015 17:06:03

Well if we enter 2016 with charts like this, at least things can only get better.



 

David M Porter
16 December 2015 17:23:34


Well if we enter 2016 with charts like this, at least things can only get better.



 


Originally Posted by: Fothergill 


At least it would be a bit drier for many areas compared to recently if that were to verify, if not cold.


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
16 December 2015 17:31:38

This is the stuff of nightmares for weather web site owners. Time for a beer I think...



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
moomin75
16 December 2015 18:03:07


 


At least it would be a bit drier for many areas compared to recently if that were to verify, if not cold.


Originally Posted by: David M Porter 

Indeed David, but with charts like that and no real end in sight, one could be forgiven for writing off at least the first half of January too. 😋


In all seriousness though, these are without a doubt desperate times. Before we know it we will indeed be half way through the meteorological winter with no sign of winter at all in England and Wales.


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Witney, Oxfordshire
100m ASL
Hendon Snowman
16 December 2015 18:10:31


Indeed David, but with charts like that and no real end in sight, one could be forgiven for writing off at least the first half of January too. 😋


In all seriousness though, these are without a doubt desperate times. Before we know it we will indeed be half way through the meteorological winter with no sign of winter at all in England and Wales.


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Originally Posted by: moomin75 


 


we had a 12 minute intense snowfall in November in North West London

Justin W
16 December 2015 18:14:13


Indeed David, but with charts like that and no real end in sight, one could be forgiven for writing off at least the first half of January too. 😋


In all seriousness though, these are without a doubt desperate times. Before we know it we will indeed be half way through the meteorological winter with no sign of winter at all in England and Wales.


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Originally Posted by: moomin75 


 


It's mid December. While Christmas is looking like it will be green and mild, to suggest we should now be writing off January is ridiculous.


Yo yo yo. 148-3 to the 3 to the 6 to the 9, representing the ABQ, what up, biatch?
David M Porter
16 December 2015 18:15:16


Indeed David, but with charts like that and no real end in sight, one could be forgiven for writing off at least the first half of January too. 😋


In all seriousness though, these are without a doubt desperate times. Before we know it we will indeed be half way through the meteorological winter with no sign of winter at all in England and Wales.


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Originally Posted by: moomin75 


Best just wait and see where we are come of the end of December/start of January before we start even thinking about February or late January for that matter, if you ask me.


The GFS op runs in FI does seem to be hinting at some of pressure rise to the E/SE of the UK around the turn of the year, which actually ties in somewhat with the MetO's thoughts about things possibly turning more settled in the south at least in early January. Who knows, this could if it verifies be the beginning of some kind of pattern change For my money, a rather drier spell in needed more than a wintry spell at the moment.


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
Rob K
16 December 2015 18:22:40


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Originally Posted by: moomin75 


 


It's the 16th of December! Even a 10-day forecast, which is the furthest anybody should be looking, barely takes us past Christmas. 


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
moomin75
16 December 2015 18:52:22


 


 


It's the 16th of December! Even a 10-day forecast, which is the furthest anybody should be looking, barely takes us past Christmas. 


Originally Posted by: Rob K 

Hence the tongue poke smiley. It was a bit of gallows humour mate....don't worry I'm not writing off January just yet. I am definitely sticking to my December write off though.  â˜º


Witney, Oxfordshire
100m ASL
TimS
  • TimS
  • Advanced Member
16 December 2015 18:53:52
I like mild weather. This is nice.
Brockley, South East London 30m asl
Polar Low
16 December 2015 18:54:38

 Thanks for taking the time Q



By 384 hours the Alaskan part of the polar vortex seems to have gone, and the vortex is now centered actually over Greenland. Note you can still see some of the debris in the middle east from when it got cut off earlier! 



Although to a certain degree it seems to have intensified again, it has been displaced to the south which is interesting. Note this is also the case at much higher levels including the stratospheric polar vortex. Note the tropospheric polar vortex is a 'thing', as far as I'm aware the lowest part is indeed the 500hpa level which is what I am looking at now. Anyway at the 10mb level:



We see some of this displacement south mirrored. What I think this means in practice is the potential for LPs to move on more southerly courses than usual which does mean we could be potentially on the cold side come January! 


 


Originally Posted by: Quantum 

Whether Idle
16 December 2015 19:02:27


Indeed David, but with charts like that and no real end in sight, one could be forgiven for writing off at least the first half of January too. 😋


In all seriousness though, these are without a doubt desperate times. Before we know it we will indeed be half way through the meteorological winter with no sign of winter at all in England and Wales.


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Originally Posted by: moomin75 


Good on you Moomin.  I don't blame you for adopting that approach, I can think of many winters - 1973-4, 1974-5, 1979-80, 1987-88, 1988-89, 1991-92, 1994-95, 1997-98, 1998-99, 2001-02, 2006-7, 2007-8, 2013-14, 2014-15 which started mild and continued that way without any great change.


It could be the case that January will deliver cold and snow, but of all the winter months,  January regularly fails to deliver.  In my book December and February have been more inclined to deliver the cold goods for a long while now.


Hope will spring eternal for some of a SSW or some other mechanism to bring cold, but for others such as yourself you prefer a different approach, and that is to be respected, and when the long term stats are viewed objectively, could be regarded as sagacious.


I would like a cold snap or spell as much as the next cold lover but my expectations are tempered by my knowledge of past events.  It is possible, of course, that there could be a dramatic turn around to cold for the UK in early January , but I see the current pattern as self sustaining and balanced.  This wont stop me looking at the models, but it will stop me clutching at cold straws which are ultimately chimeras.


Dover, 5m asl. Half a mile from the south coast.
Gooner
16 December 2015 19:31:21

I like mild weather. This is nice.

Originally Posted by: TimS 


You clearly haven't been under 4 feet of water recently then


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


LeedsLad123
16 December 2015 20:03:19


 


Good on you Moomin.  I don't blame you for adopting that approach, I can think of many winters - 1973-4, 1974-5, 1979-80, 1987-88, 1988-89, 1991-92, 1994-95, 1997-98, 1998-99, 2001-02, 2006-7, 2007-8, 2013-14, 2014-15 which started mild and continued that way without any great change.


It could be the case that January will deliver cold and snow, but of all the winter months,  January regularly fails to deliver.  In my book December and February have been more inclined to deliver the cold goods for a long while now.


Hope will spring eternal for some of a SSW or some other mechanism to bring cold, but for others such as yourself you prefer a different approach, and that is to be respected, and when the long term stats are viewed objectively, could be regarded as sagacious.


I would like a cold snap or spell as much as the next cold lover but my expectations are tempered by my knowledge of past events.  It is possible, of course, that there could be a dramatic turn around to cold for the UK in early January , but I see the current pattern as self sustaining and balanced.  This wont stop me looking at the models, but it will stop me clutching at cold straws which are ultimately chimeras.


Originally Posted by: Whether Idle 


February is the only winter month that hasn't seen a sub-3C CET this century. We are well overdue a properly cold February.


Also, LRFs by amateurs are usually complete crap. People get lucky - simple as that. Sitting on your arse saying it's going to be exceptionally mild doesn't make you a skilled forecaster.


Whitkirk, Leeds - 85m ASL.
David M Porter
16 December 2015 20:04:31


 


Good on you Moomin.  I don't blame you for adopting that approach, I can think of many winters - 1973-4, 1974-5, 1979-80, 1987-88, 1988-89, 1991-92, 1994-95, 1997-98, 1998-99, 2001-02, 2006-7, 2007-8, 2013-14, 2014-15 which started mild and continued that way without any great change.


 


Originally Posted by: Whether Idle 


Can't say I agree about last winter, at least not from the point of view of my own location. The first 6 weeks or so of last winter were mild, unsettled and often rather turbulent. After mid-January however it was generally much quieter, less unsettled and generally colder than the first half with a couple of snowfalls thrown in for good measure, although nothing major.


Maybe your own location was a different story though.


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
moomin75
16 December 2015 20:11:25


 


February is the only winter month that hasn't seen a sub-3C CET this century. We are well overdue a properly cold February.


Also, LRFs by amateurs are usually complete crap. People get lucky - simple as that. Sitting on your arse saying it's going to be exceptionally mild doesn't make you a skilled forecaster.


Originally Posted by: LeedsLad123 

Never said I was a skilled forecaster mate. What I am is an enthusiast like everyone else, and absolutely LRFs are pretty much guesswork. However, that doesn't stop people having a crack at them, because above all else we are all complete weather nerds and enthusiasts. 😀


And I would also agree we haven't had a really cold Feb for many years. Come to that, we haven't really had a cold January in recent times either. Sadly though, as you know, being overdue doesn't make it any more or less likely.


All I will say with some confidence is that we are sure to get a cold snap at some stage between now and April.....trouble is it may very well be later than sooner.


Lets hope not though. 😊


Witney, Oxfordshire
100m ASL
KevBrads1
16 December 2015 20:17:42


 


Good on you Moomin.  I don't blame you for adopting that approach, I can think of many winters - 1973-4, 1974-5, 1979-80, 1987-88, 1988-89, 1991-92, 1994-95, 1997-98, 1998-99, 2001-02, 2006-7, 2007-8, 2013-14, 2014-15 which started mild and continued that way without any great change.


Originally Posted by: Whether Idle 


1973-74, December was not that mild, was close to average.


1974-75, second half was cooler than the first half, it was cooler than the second half of winter 1981-82


1979-80, January was actually below average.


1987-88, actually started off chilly, the first half of December was below average


1991-92, December and January were actually roughly overall average


2001-02, December and first 10 days of January were below average


 


MANCHESTER SUMMER INDEX for 2021: 238
Timelapses, old weather forecasts and natural phenomena videos can be seen on this site
http://www.youtube.com/channel/UCgrSD1BwFz2feWDTydhpEhQ/playlists
bledur
16 December 2015 20:17:56

I like mild weather. This is nice.

Originally Posted by: TimS 


 I wouldn,t mind mild if it was dry and bright. Since the beginning of November it has been virtually non stop cloud and damp and yes i know November and December tend to be cloudy and damp , but this is taking the piss .Cursing

TimS
  • TimS
  • Advanced Member
16 December 2015 20:33:18


 


You clearly haven't been under 4 feet of water recently then


Originally Posted by: Gooner 


Fair point, no I haven't.


Brockley, South East London 30m asl
roger63
16 December 2015 21:00:56


Indeed David, but with charts like that and no real end in sight, one could be forgiven for writing off at least the first half of January too. 😋


In all seriousness though, these are without a doubt desperate times. Before we know it we will indeed be half way through the meteorological winter with no sign of winter at all in England and Wales.


I won't write off winter just yet, but unless a change starts showing soon, not only in the models, but also in the MetO outlook, I think we need to start looking towards February as MetO long range model has hinted at.


 


Originally Posted by: moomin75 


.There are frequent posts saying that the models cannot predict much beyond 120h and That may well be correct if a relatively detailed forecast is required.However it is not necessarily correct to go to the next stage and say all forecasts beyond 120h are a waste of time.METO have called well so far this winter if we look at broad circulation types ie NAO +.It looks increasingly as if Dec will be another NAO+ month.Personally I will follow what Meto say about circulation types and therefore wait with interest for the contingency forecast  at the end of December and see what the call for February turns out to be. 


 

KevBrads1
16 December 2015 21:06:14

I just wonder how many weeks it'll take to fill 50 pages in this thread. I venture to suggest this one may last all winter.

Originally Posted by: moomin75 


Well this prediction was way off, we are still not within a week of Christmas Day and we are already up to 45 pages.


MANCHESTER SUMMER INDEX for 2021: 238
Timelapses, old weather forecasts and natural phenomena videos can be seen on this site
http://www.youtube.com/channel/UCgrSD1BwFz2feWDTydhpEhQ/playlists
moomin75
16 December 2015 21:10:03


 


Well this prediction was way off, we are still not within a week of Christmas Day and we are already up to 45 pages.


Originally Posted by: KevBrads1 

Already conceded defeat on that one Kev some 10 pages back.


Witney, Oxfordshire
100m ASL
Gooner
16 December 2015 21:11:58


 


1973-74, December was not that mild, was close to average.


1974-75, second half was cooler than the first half, it was cooler than the second half of winter 1981-82


1979-80, January was actually below average.


1987-88, actually started off chilly, the first half of December was below average


1991-92, December and January were actually roughly overall average


2001-02, December and first 10 days of January were below average


 


Originally Posted by: KevBrads1 


Always nice to have the facts


 


Cheers Kev


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


moomin75
16 December 2015 21:12:41
Looks like it's national get at Moomin day again. I'll just go and get my flak jacket on, Jesus lighten up people.
I've just said I don't think we can write of winter and that includes most of January and February.
Lighten up for gods sake....I am fed up with getting stick left right and centre....am I not allowed any opinion if it doesn't tow he party line.
How about we do what David keeps asking and get back to the models, which, by the way, show signs of a change to the unrelenting mild zonal dross by month end.
Witney, Oxfordshire
100m ASL

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