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roger63
23 December 2015 18:44:43


Getting that dreaded "Oh, here we go again" feeling. Looks like it may be a good idea to make sure the buildings insurance is up to date or renewed if some of those outputs are anything to go by on.

Would be interesting to see ECM's take on it. Yes, GEM still maintains that easterly theme but I think it's going to be on its own with that one.


Originally Posted by: idj20 


http://www.meteociel.fr/modeles/geme_cartes.php?&ech=240&mode=0&carte=0


GEM still showing strong HP at 240 with a trend for anticyclone to move further north.Is there  something about Gems modelling that tend sto make its output less progressive on zonal flows than say GFS.?

Ally Pally Snowman
23 December 2015 18:58:01

Some incredibly warm air for New Years Eve Eve. 


http://www.wetterzentrale.de/pics/Recm1682.html


 


Bishop's Stortford 85m ASL.
Polar Low
23 December 2015 19:11:25

Looks nasty looks neither negative or positive tilted so I guess that would be its most development



The next small trough shown as a short wave in n/h which is not correct as close up reveals to my eyes looks even more dangerous to me as its looks negative titled which could mean we have a strong jet streak near the base of the trough i hope not



 


 


 


ECM now also predicting a nasty low on the 29th. Extremely tight isobars there



Originally Posted by: Fothergill 

Polar Low
23 December 2015 19:25:21

I dont think I have seen such a extensive high pressure belt like that from ecm before little chance to  get under but not rocket science to see why it will be very unsettled period


Polar Low
23 December 2015 19:29:31

Indeed Roger its been like that before perhaps Peter can answer that question



 


http://www.meteociel.fr/modeles/geme_cartes.php?&ech=240&mode=0&carte=0


GEM still showing strong HP at 240 with a trend for anticyclone to move further north.Is there  something about Gems modelling that tend sto make its output less progressive on zonal flows than say GFS.?


Originally Posted by: roger63 

Saint Snow
23 December 2015 19:33:40


 Yes Darren as you say even UKMO are showing a hell of a storm, this one could miss the BI .......hopefully


Originally Posted by: Gooner 


 


Just a pity they won't miss the BI to our south - that scenario would likely herald some decent [ie, cold] weather. Even if the tracked along the Channel & then into continental Europe, it'd be better.


That Euro High is bloody resilient. Every time the models begin to hint at energy slipping SE'wards & pressure potentially building to our NE, it regroups and the energy charges NE'wards to prevent any retrogression of the high.


Our climate stinks.


 



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
Cumbrian Snowman
23 December 2015 19:35:03

I live in Cumbria. Yes we are used to the rain. Part of Cumbria is called the Lake District and for good reason. But I think we had our fill now.


This mild weather has been a blessing for many I,m sure but it just means wet weather for us up here.


Models indicating two major storms either side of New Year by the looks of it. Thank goodness I live on top of a modest hill.


I think I am on my 54th day on the trot when rain has fallen -  last dry day 26th October


White Meadows
23 December 2015 19:36:01
A quick glimpse of the output is all that's needed this evening.
More of the same from the past 3 weeks output, only much stormier. In fact a repeat of Dec 13 - Jan 14 raging succession of dartboard lows looks probable looking at the big 3
Polar Low
23 December 2015 19:36:45

Indeed Jacko  thats how I feel very sensible and concerning post


 


 


Evening all.
I can't remember who mentioned it about a week ago but a direct hit from one of these bombs or sting jet is a real concern atm.
Of even more concern is the amount of rain again in the North West- it's just terrible for these poor folks.
Whatever weather we all prefer, a quieter spell be it mild or cold is something desperately needed here.
Lots of interest in the models currently- it certainly isn't boring!

Originally Posted by: JACKO4EVER 

David M Porter
23 December 2015 19:40:34

ECM has joined GFS in digging the jet a little further south than it is at present by the time we get to the first weekend in January. Although it won't be exactly freezing should that verify, I imagine that temps would be something approaching more seasonal values rather than the exceptional mildness of recent times.


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
Sevendust
23 December 2015 19:58:01


ECM has joined GFS in digging the jet a little further south than it is at present by the time we get to the first weekend in January. Although it won't be exactly freezing should that verify, I imagine that temps would be something approaching more seasonal values rather than the exceptional mildness of recent times.


Originally Posted by: David M Porter 


Bad news if you don't like storms though. As the jet dips, the propensity for storms to crash into the UK and not pass to the NW increases.


We are heading for a very stormy period for some time in my view

Quantum
23 December 2015 20:10:33

May not seem like it but the polar vortex is weakening, and the AO is responding by trending negative.


I think we all knew that cold weather was not going to happen this month, but don't rule out the start of January just yet.



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.
Quantum
23 December 2015 20:13:52

I honestly think the polar vortex will completely collapse in mid January. For weeks now its held off attacks like little fleas biting a horse, but it can only take so much...



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.
Polar Low
23 December 2015 20:53:00

Sometimes Q we dont need no help from the pv, sometimes its not always the end all 



 


 


I honestly think the polar vortex will completely collapse in mid January. For weeks now its held off attacks like little fleas biting a horse, but it can only take so much...



Originally Posted by: Quantum 

Stormchaser
23 December 2015 21:14:09

I've long had mid-Jan in mind Q so I'd enjoy it if you were right!


Though there don't seem to be many left who are optimistic about it being that early. Consensus seems to have shifted toward late Jan.


 


On a bit of a tangent this but I was just looking at the latest SST anomalies in detail:


http://ghrsst-pp.metoffice.com/pages/latest_analysis/sst_monitor/ostia/anom_plot.html?i=34&j=2


...and was struck by just how toasty the North Sea and Baltic Sea are compared to the usual. No surprise given the recent weather but it raises a question as to what magnitude of easterly it would take ti overcome that situation. As epic as the convection could be from a proper 'beasterly' making the trip, I suspect we're better off hoping that a more NW'rly component to the weather during the first 10 days or so of Jan can work to lower those SSTs a bit.


The linked chart also shows the effect of having copious amounts of rain across western parts, with anomalously low SSTs near-shore. Not sure why there's a slight effect in the Channel though, as it's been no wetter than average across much of the south, in fact notably drier than that at my location for example with only 62% of the norm to the 22nd.


 


Good signs of a pattern change are now featuring in the model output as we end the year and begin the next. Useful components going forward (for attacking the polar vortex) look to be a massive blocking high over Asia, a deep trough affecting the UK (uncertain placement though) and more of a western ridge + eastern trough combination over the U.S., provided that ridge can extend through Canada and toward the pole at times.


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Keep Calm and Forecast On
Shropshire
23 December 2015 21:17:56


 


Its  bad news this evening Darren.  Not only has the tiny chance of an easterly in the offing entirely gone but the might of the Atlantic will be shown over the next week.  As a householder who has been the victim of storm damage I am feeling a sense of unease as these deep stormy lows are predicted.  We must all hope that at the time the reality is far less extreme.


Originally Posted by: Whether Idle 


There was never any chance of an easterly - we need to accept that we are heading for the warmest and wettest (in the NW) winter ever.


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.
David M Porter
23 December 2015 21:26:03


 


There was never any chance of an easterly - we need to accept that we are heading for the warmest and wettest (in the NW) winter ever.


Originally Posted by: Shropshire 


Speculation, not fact.


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
Quantum
23 December 2015 21:28:11


I've long had mid-Jan in mind Q so I'd enjoy it if you were right!


Though there don't seem to be many left who are optimistic about it being that early. Consensus seems to have shifted toward late Jan.


 


On a bit of a tangent this but I was just looking at the latest SST anomalies in detail:


http://ghrsst-pp.metoffice.com/pages/latest_analysis/sst_monitor/ostia/anom_plot.html?i=34&j=2


...and was struck by just how toasty the North Sea and Baltic Sea are compared to the usual. No surprise given the recent weather but it raises a question as to what magnitude of easterly it would take ti overcome that situation. As epic as the convection could be from a proper 'beasterly' making the trip, I suspect we're better off hoping that a more NW'rly component to the weather during the first 10 days or so of Jan can work to lower those SSTs a bit.


The linked chart also shows the effect of having copious amounts of rain across western parts, with anomalously low SSTs near-shore. Not sure why there's a slight effect in the Channel though, as it's been no wetter than average across much of the south, in fact notably drier than that at my location for example with only 62% of the norm to the 22nd.


 


Good signs of a pattern change are now featuring in the model output as we end the year and begin the next. Useful components going forward (for attacking the polar vortex) look to be a massive blocking high over Asia, a deep trough affecting the UK (uncertain placement though) and more of a western ridge + eastern trough combination over the U.S., provided that ridge can extend through Canada and toward the pole at times.


Originally Posted by: Stormchaser 


Anything inland won't have a problem with very high SSTs like that, in fact like you point out; all they would do is make the lake effect far stronger. Any easterly cold enough to produce decent lake effect snow will also be cold enough to be entirely snow with the exception of places in the immediate vincinity of the coast.


Basically anything at -8C or lower, which is what a proper easterly would bring anyway.


 


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.
Arbroath 1320
23 December 2015 22:17:58

GFS 18z out to t144 and looks much more like GEM 12z at the same stage. High pressure stronger to our East and more persistent than on GFS 12z. Not sure if it will make any difference as the run progresses?


GGTTH
Saint Snow
23 December 2015 22:23:38


GFS 18z out to t144 and looks much more like GEM 12z at the same stage. High pressure stronger to our East and more persistent than on GFS 12z. Not sure if it will make any difference as the run progresses?


Originally Posted by: Arbroath 1320 


 


Hopefully we'll see energy diverted on a SE trajectory.


 


Edit: nope


 



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
Saint Snow
23 December 2015 22:26:33

Out to nearly the end of the year, and the block to our east is hanging on slightly better on this run - but that only serves to hold the low over the UK longer.


 



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
Quantum
23 December 2015 22:28:03

OK this is interesting, there is a very slight easterly component in the winds. Will quantum's rule be obyed?


Netweather GFS Image


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.
Saint Snow
23 December 2015 22:30:03


OK this is interesting, there is a very slight easterly component in the winds. Will quantum's rule be obyed?


 


Originally Posted by: Quantum 


 


Roll it on a few frames, and GFS says no....


 


 



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
Polar Low
23 December 2015 22:37:09

Not hard to see why


http://www.meteociel.fr/modeles/gfse_cartes.php?&ech=150&mode=5&carte=1


Maybe a better chance as time goes on


 



OK this is interesting, there is a very slight easterly component in the winds. Will quantum's rule be obyed?


Netweather GFS Image


Originally Posted by: Quantum 

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