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Saint Snow
07 December 2020 23:23:46


 


Dec 10 gave one day of snow here. 


Originally Posted by: picturesareme 


 


One day more than the BftE* (or the Jan 87 spell) gave here.


 


* apart from a couple of transient, sub-1cm dustings



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
07 December 2020 23:24:50

Another kick in the gonads from the pub run 😣

Originally Posted by: White Meadows 


 


It's the hope that kills you 




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
Gandalf The White
07 December 2020 23:25:58

Another kick in the gonads from the pub run 😣

Originally Posted by: White Meadows 


The end of the run looks just fine to me?



Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Saint Snow
07 December 2020 23:34:49


 


The end of the run looks just fine to me?



Originally Posted by: Gandalf The White 


 


Temporarily colder air from a transitory ridging northwards by the AH, in what looks like a moderately mobile set-up. Meanwhile, a huge block sits covering most of mainland Eurasia


 


 



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
Gandalf The White
07 December 2020 23:45:45


 


 


Temporarily colder air from a transitory ridging northwards by the AH, in what looks like a moderately mobile set-up. Meanwhile, a huge block sits covering most of mainland Eurasia


 


 


Originally Posted by: Saint Snow 


If you run the sequence it's not necessarily a transitory ridge. Even if it is, it's still lining up to deliver a seasonal start to Xmas.


Anyway, let's see where the Op sits in the ensembles.


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


BJBlake
07 December 2020 23:51:47

The speed of climate change cannot be underestimated. I have seen a dramatic change in my lifetime. When I read my dad’s diaries from his childhood, it is even more stark - because I read how the winters were so hard, even in the Deep south of the UK - on their farm near Chichester, where he used to watch dog fights during the Battle of Britain, and learned to skate on ponds - because the ice was so thick. Snow and ice were normal. Today, the 1 degree of additional heat has made a dramatic difference in the Uk, so lasting cold is rare. We need all the ducks to be aligned now - meaning long batches of mobile, mild and wet winters, with barely a frost. This winter and in particular the next should see more ducks aligned, in terms of ENSO, QBO, sunspot numbers, disrupted jet stream etc. The delay in the accumulation of cold is a factor of the modern winter, as it takes longer for the N. hemisphere to cool down, and it is heating back up again in spring much sooner. The target of Late December to Mid Feb is narrowing, but for another decade or two, the right conditions should deliver. What is encouraging, after the eye candy of the GFS charts in FI this morning, is that the jet is consistently signalled to remain disrupted - which means that the chance of a block developing is still high, and being at the start of winter, such rinse/ repeats have a chance of bringing ever greater cold - assuming they are in  a decent configuration. I would therefore not be too surprised to see tomorrows run back showing more eye candy to tease us with. 


Brecklands, South Norfolk 28m ASL
Arbroath 1320
07 December 2020 23:55:48

Another kick in the gonads from the pub run 😣

Originally Posted by: White Meadows 


A fairly uninspiring set of 18z ENS as well, which in the main range beween the Atlantic systems heading into Scandi to continental high pressure stubbornly hanging on and sending  S/SE winds over us. There's the odd more interesting run, but that's it.


 


 


GGTTH
Russwirral
07 December 2020 23:58:23


The speed of climate change cannot be underestimated. I have seen a dramatic change in my lifetime. When I read my dad’s diaries from his childhood, it is even more stark - because I read how the winters were so hard, even in the Deep south of the UK - on their farm near Chichester, where he used to watch dog fights during the Battle of Britain, and learned to skate on ponds - because the ice was so thick. Snow and ice were normal. Today, the 1 degree of additional heat has made a dramatic difference in the Uk, so lasting cold is rare. We need all the ducks to be aligned now - meaning long batches of mobile, mild and wet winters, with barely a frost. This winter and in particular the next should see more ducks aligned, in terms of ENSO, QBO, sunspot numbers, disrupted jet stream etc. The delay in the accumulation of cold is a factor of the modern winter, as it takes longer for the N. hemisphere to cool down, and it is heating back up again in spring much sooner. The target of Late December to Mid Feb is narrowing, but for another decade or two, the right conditions should deliver. What is encouraging, after the eye candy of the GFS charts in FI this morning, is that the jet is consistently signalled to remain disrupted - which means that the chance of a block developing is still high, and being at the start of winter, such rinse/ repeats have a chance of bringing ever greater cold - assuming they are in  a decent configuration. I would therefore not be too surprised to see tomorrows run back showing more eye candy to tease us with. 


Originally Posted by: BJBlake 


 


I wouldnt say i was a denier, but blimey... the past few winters have become increasingly dire - if they werent that bad already...


 


The average temp for Nov has increased year on year here, wetter, and frosts rarer.


 


I get the point - one winter does not make a climate.  But theres just no way of getting round it now.  


 


just an example of how mild its been recently - theres still bedding plants in my neighbours garden... In my other neighbours garden we have a lilly beginnig to flower.


 


David M Porter
08 December 2020 00:59:59

A wee bit of friendly advice here from a fellow member: It would be good if we could focus on the model output without bringing climate change into the discussion. Bearing in mind what Brian said about this more than a year ago, we don't want to give him any reasons to wield the axe on anyone or anything, do we! There are threads which IMHO are appropriate for making mention of that subject, but I'm not sure this is one of them.


Back on topic: Still much uncertainty in the output for later in December. The atlantic looks as if it wants to take over, but the block to the east just about manages to prevent a total takeover by the atlantic. There are also some suggestions of the arctic high possibly coming into play later on in the month too. As I see it, things are still a long way from being decided one way or another.


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
White Meadows
08 December 2020 05:15:32
Another dire 00z run, this is also undeniable. The northern arm of the jet firing up, more mobile westerly systems barrelling in over the British Isles.
CreweCold
08 December 2020 05:51:04
Looks to me like we're heading for a split of the TPV. Now showing on the GEFS mean height anomaly around day 10. A fairly substantial feature.

If it aligns right, we're in for one hell of a festive period weather wise. Back end of the 0z GFS shows what's possible in that scenario. -20 uppers barreling towards the UK, which would be a 1 in 10-20 year event.

GEM has a similar scenario at day 10.

My advice would be to buckle in.

Crewe, Cheshire
55 metres above sea level
Heavy Weather 2013
08 December 2020 06:17:06
What a lovely end to the 0z GFS. That’s two days now we have seen something like that develop.

It’s one to save. That high is just fab.

I said a few days ago we might need a small encroachment from the Atlantic to get things moving again as the rut was being tiresome it’s dangerous. But the odds seem good as blocking seems to be a bit of a form horse atm.
Mark
Beckton, E London
Less than 500m from the end of London City Airport runway.
CField
08 December 2020 07:03:43

Nice to see some proper festive charts on the Xmas run up.....if this sort of set up verifies things are going to evolve pretty quickly.Lets hope something similar is around at 168hrs....the UK often gets hit by a rex this time of year in colder Decembers.


Favourite snowstorm
Famous channel low
Dec 31st 1978
Hastings East Sussex
Foot of level snow severe drifting
Next day max temp -4 degrees Celsius
ballamar
08 December 2020 07:10:11

Another dire 00z run, this is also undeniable. The northern arm of the jet firing up, more mobile westerly systems barrelling in over the British Isles.

Originally Posted by: White Meadows 


going to deny it

DEW
  • DEW
  • Advanced Member
08 December 2020 07:22:25

Some seasonable very cold air making a move into Russia in week 2.  http://www.wxmaps.org/pix/temp4 IMO cold air masses, like hurricanes, 'make their own weather' and can be difficult to stop once they're on the move. Here's hoping! but back to the here and now ...


GFS - a rather jumbled picture with LP on the Atlantic pushing the occasional trough across the UK (e.g. Sat 12th) but not developing strongly or making progress E'wards. Ridge from Azores HP from Thu 17th becomes centred over UK Wed 23rd so possibly some seasonal frosty weather. A promising long fetch E'ly shown on the final chart Thu 24th which has by then got as far as Scandi - put back by a day since yesterday's chart so will we still get a Christmas present?


GEFS - temps rising to norm Fri 11th and staying there (or a little above ca Mon 14th) with slight cooling towards Thu 24th (and one stellar (sic)  outlier at -14C!) Bits and pieces of rain mostly around Mon 14th, and more in the SW than elsewhere .


ECM - agrees with GFS to Sat 12th but then keeps the Atlantic influence going with LP centre moving up the W Coast to Scotland Thu 17th.


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

Chichester 12m asl
Rob K
08 December 2020 07:26:50

Looks to me like we're heading for a split of the TPV. Now showing on the GEFS mean height anomaly around day 10. A fairly substantial feature.

If it aligns right, we're in for one hell of a festive period weather wise. Back end of the 0z GFS shows what's possible in that scenario. -20 uppers barreling towards the UK, which would be a 1 in 10-20 year event.

GEM has a similar scenario at day 10.

My advice would be to buckle in.

Originally Posted by: CreweCold 


P30 shows the cold arriving a few days earlier and in time for Christmas. Ah well we can dream...


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." β€” Jerome K. Jerome
BJBlake
08 December 2020 07:35:52

There you go - the eye candy is back to ‘commute on the double 00’ with rinse and repeat block set to give Santa a helping hand from his Lapland residence, although that timing would not deliver until Boxing Day - statistically always twice as likely as the big day itself. The emotionally engaging rollercoaster will tease out the outcome to grief or glory throughout advent - no doubt. So deep into FI its still just a dream, but better its there than not.


Brecklands, South Norfolk 28m ASL
Shropshire
08 December 2020 07:50:38

Looks to me like we're heading for a split of the TPV. Now showing on the GEFS mean height anomaly around day 10. A fairly substantial feature.

If it aligns right, we're in for one hell of a festive period weather wise. Back end of the 0z GFS shows what's possible in that scenario. -20 uppers barreling towards the UK, which would be a 1 in 10-20 year event.

GEM has a similar scenario at day 10.

My advice would be to buckle in.

Originally Posted by: CreweCold 


 


What for ? Poor ECM today with low pressure anchored out to the West bringing mild conditions and potential flooding for Western areas.


And for those looking at day 10 plus for hope the ECM shows the modern spolier - a shortwave at the end of the jetstreak.


 


 


 


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.
nsrobins
08 December 2020 07:52:08


14 Across: The emotionally engaging rollercoaster will tease out the outcome to grief or glory throughout advent - no doubt (10) 

Originally Posted by: BJBlake 


☺️


 


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
08 December 2020 08:01:09

Another dire 00z run, this is also undeniable. The northern arm of the jet firing up, more mobile westerly systems barrelling in over the British Isles.

Originally Posted by: White Meadows 


I have had a look at the output across the models this morning and I think your post is extremely misleading. I am not pretending it is a stunning outlook for coldies but I think you have gone too far the other way 


Malcolm UserPostedImage
Wakefield & Gothenburg, SWE
pdiddy
08 December 2020 08:01:26


 


 


What for ? Poor ECM today with low pressure anchored out to the West bringing mild conditions and potential flooding for Western areas.


And for those looking at day 10 plus for hope the ECM shows the modern spolier - a shortwave at the end of the jetstreak.


 


 


 


Originally Posted by: Shropshire 


yes, but this is not a typical Zonal type anomaly showing at that point is it?


Shropshire
08 December 2020 08:04:44


 


yes, but this is not a typical Zonal type anomaly showing at that point is it?



Originally Posted by: pdiddy 


 


I'm not saying the output is not without interest for the latter third of the month, however it is deep FI and we've seen this sort of thing before only to see it all scuppered at T144 or less by shorwaves - think the great failure of Dec 2012.


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.
BJBlake
08 December 2020 08:06:56

There are always non-model signs to the winter ahead, and one exceedingly rare event in recent years - which suggests this year will be different from the muck and mayhem of recent Atlantic dominated winters is the fact that I still have a smattering of snow on my back lawn that fell on Friday. I cannot remember having lying snow last so long since the beast from the east and before that for a fair few years. Also if it lasts today - it will be 2 consecutive ice days and nights with rime frost and freezing fog. Not sen that in a long time too. Whilst one or other model scenario might not work out as per usual, something will with the different background factors in the mix, IMO, despite the gloom from the met office.


Brecklands, South Norfolk 28m ASL
Ally Pally Snowman
08 December 2020 08:56:27

Looks to me like we're heading for a split of the TPV. Now showing on the GEFS mean height anomaly around day 10. A fairly substantial feature.

If it aligns right, we're in for one hell of a festive period weather wise. Back end of the 0z GFS shows what's possible in that scenario. -20 uppers barreling towards the UK, which would be a 1 in 10-20 year event.

GEM has a similar scenario at day 10.

My advice would be to buckle in.

Originally Posted by: CreweCold 


 


Love a good cold ramp. Nice one Crewe. 


Bishop's Stortford 85m ASL.
tallyho_83
08 December 2020 08:59:00

Control for Xmas Day: - Looks like it could be a set up for an easterly, beasterly for between Xmas and NY. - Take a look at the extended run for fun: - This is far from mild zonality and indicative of a -AO and NAO.


https://www.wetterzentrale.de/en/topkarten.php?map=1&model=gfs&var=1&time=462&run=99&lid=C00&h=0&mv=0&tr=6


GFS 00Z Operational end blocked in FI range yet again - so something is up?  A SSW could take place? Who knows. I wonder what today's update will show!?



 


Even the strength of zonal winds will weaken too and go into reverse on many runs - even bias corrected!? Could always change of course but watch this space.


No description available.


Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
---------------------------------------
Sean Moon
Magical Moon
www.magical-moon.com


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