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lezrob
06 December 2017 06:03:50
Yes Marcus hopefully itโ€™ll be a M4 north event ๐Ÿ˜‚
Been lurking for 7 years... Still know nothing.. Weather fascinates..
Banbury Oxon
Rob K
06 December 2017 06:17:16
Yes a tiny bit more hopeful in the south. The end of the run is rather ugly though, and on the ensembles there seems to be a marked move to mobility from about the 17th.

Control still builds a nice Scandi high though!
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." โ€” Jerome K. Jerome
nsrobins
06 December 2017 06:45:57
It is still virtually impossible to put detail on the distribution of snowfall from Thurs evening, but most of us know the score with pM modified north/northwesterlies. If youโ€™re in the right place you could well see 10cm whilst someone ten miles up the road has a flurry.
For Sunday a correction South has occurred which will be influential on who gets snow from it but again it is way too early to call and the UKM quite rightly arenโ€™t commiting on it yet.
Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Gooner
06 December 2017 06:54:43

It is still virtually impossible to put detail on the distribution of snowfall from Thurs evening, but most of us know the score with pM modified north/northwesterlies. If you’re in the right place you could well see 10cm whilst someone ten miles up the road has a flurry.
For Sunday a correction South has occurred which will be influential on who gets snow from it but again it is way too early to call and the UKM quite rightly aren’t commiting on it yet.

Originally Posted by: nsrobins 


indeed Neil but the Beeb have now mentioned significant snow possible on Sunday .....areas not mentioned 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
06 December 2017 06:57:57

I like the way ECM has ended up this morning 


No grumbles from me with the charts so far 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Brian Gaze
06 December 2017 07:22:06

GEFs 00z showing signs of a change in the run up to Xmas with an increase in the number of milder outcomes. There will obviously be a lot of interest in that period and the cold weather in the short term is likely to shorten the odds of a White Christmas.  



Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Arcus
06 December 2017 07:26:12


 


indeed Neil but the Beeb have now mentioned significant snow possible on Sunday .....areas not mentioned 


Originally Posted by: Gooner 


She flagged Midlands northwards for Sunday on the 7.20 forecast. My raw MetO for Sunday gives light snow at around 6pm and with the wind direction looks like a more S'ly track as per GFS 00z to me.


Ben,
Nr. Easingwold, North Yorkshire
30m asl
Joe Bloggs
06 December 2017 07:38:14

Stunning output this morning.


Somewhere is going to get a lot of snow later this weekend, still not quite sure yet. Latest thoughts from GFS in terms of distribution - http://www.wetterzentrale.de/maps/GFSOPUK00_120_25.png


The latter stages of ECM looks decent too.


The snow risk is certainly very high across parts of the UK but it will go down to the wire in terms of which areas will be affected. Very exciting. 



Manchester City Centre, 31m ASL

nsrobins
06 December 2017 07:40:31


I like the way ECM has ended up this morning 


No grumbles from me with the charts so far 


Originally Posted by: Gooner 


ECM has obviously got the right idea ๐Ÿ˜‰


Worth noting again how subdued the uppers are on ECM. A rough verification is possible during the imminent cold spell with GFS consistently 2-3deg lower with uppers than ECMin the build-up over the last few days runs.


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
squish
06 December 2017 07:40:50
I notice ECM and ( more especially ) GEM have thrown out very wintry runs this morning . Lots going on the next few days!
D.E.W on Dartmoor. 300m asl
nsrobins
06 December 2017 07:43:49


Stunning output this morning.


Somewhere is going to get a lot of snow later this weekend, still not quite sure yet. Latest thoughts from GFS in terms of distribution - http://www.wetterzentrale.de/maps/GFSOPUK00_120_25.png


The latter stages of ECM looks decent too.


The snow risk is certainly very high across parts of the UK but it will go down to the wire in terms of which areas will be affected. Very exciting. 


Originally Posted by: Joe Bloggs 


Excitement for most is index linked to location Joe. If I was a snow-lover in Manchester this morning I’d be excited. For a South coaster I have to remain a little more subjective ๐Ÿ˜Š


All of course still in the melting (pun not intended) pot and as we’ve read so many times disruptive troughs are notoriously tricky to model.


Neil
Fareham, Hampshire 28m ASL (near estuary)
Stormchaser, Member TORRO
Rob K
06 December 2017 07:50:19
WRF-NMM has also corrected southwards a little. The downside is that the amount of precipitation has reduced.

http://www.meteociel.fr/modeles/wrfnmm.php?ech=113&mode=42&map=20 

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." โ€” Jerome K. Jerome
Shropshire
06 December 2017 07:53:24

ECM this morning looks very much in line with the METO outlook, not an 1981 or a 2010 but certainly potentially notable given from my experience early to mid December is usually one of the most zonal periods of the winter both pre and during the modern era.


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.
soperman
06 December 2017 07:56:15

Yep... snow creeping our way if you believe the models.


Very likely to be a nowcast event - only problem it comes a day too late to enjoy the white stuff! 


 

roger63
06 December 2017 07:59:38


 


ECM has obviously got the right idea ๐Ÿ˜‰


Worth noting again how subdued the uppers are on ECM. A rough verification is possible during the imminent cold spell with GFS consistently 2-3deg lower with uppers than ECMin the build-up over the last few days runs.


Originally Posted by: nsrobins 


I know its out of reliable  range but both the Sunday /Monday and Wednesday/Thursday sliders next week have  currently uppers in the -4 to -6 range which would suggest rain rather snow in the south.

Gandalf The White
06 December 2017 08:03:15

ECM Day 8 ensemble mean shows a strong signal for ridging into Greenland and a trough in the North Sea. A long way off but a good long wave position for continued cold. 



The precise track of the slider continues to be adjusted with every run and every model. We should expect that to continue but with a slow reduction in the uncertainty - but I can see this becoming a nowcast for some come Sunday.


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Gandalf The White
06 December 2017 08:05:10


 


I know its out of reliable  range but both the Sunday /Monday and Wednesday/Thursday sliders next week have  currently uppers in the -4 to -6 range which would suggest rain rather snow in the south.


Originally Posted by: roger63 


Remember Quantum’s post. -4/-6 is good enough, depending on other factors.


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Maunder Minimum
06 December 2017 08:09:47

The lastest charts currently look decent for the West Midlands, but I am not going to get excited yet, since as others have averred above, marginal snow is invariably a nowcast for the UK. Fingers crossed though - would love to see lying snow.


New world order coming.
Downpour
06 December 2017 08:31:23


ECM this morning looks very much in line with the METO outlook, not an 1981 or a 2010 but certainly potentially notable given from my experience early to mid December is usually one of the most zonal periods of the winter both pre and during the modern era.


Originally Posted by: Shropshire 


 


A more notable event would be your omitting the phrase modern era from one of your posts. No sign on any of the models of that.


Chingford
London E4
147ft
Joe Bloggs
06 December 2017 08:37:45


 


I know its out of reliable  range but both the Sunday /Monday and Wednesday/Thursday sliders next week have  currently uppers in the -4 to -6 range which would suggest rain rather snow in the south.


Originally Posted by: roger63 


As Q pointed out so well yesterday I do think sometimes we rely too much on uppers in frontal snow events. Some of our best snow events happen when the uppers are above -5C.. I tend to prefer looking at the DP projections but obviously it is only GFS that supply that data.



Manchester City Centre, 31m ASL

Gooner
06 December 2017 08:38:12

WRF-NMM has also corrected southwards a little. The downside is that the amount of precipitation has reduced.

http://www.meteociel.fr/modeles/wrfnmm.php?ech=113&mode=42&map=20

Originally Posted by: Rob K 


Very IMBYism


I'm more than happy that


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Joe Bloggs
06 December 2017 08:39:21


 


Excitement for most is index linked to location Joe. If I was a snow-lover in Manchester this morning I’d be excited. For a South coaster I have to remain a little more subjective ๐Ÿ˜Š


All of course still in the melting (pun not intended) pot and as we’ve read so many times disruptive troughs are notoriously tricky to model.


Originally Posted by: nsrobins 


Absolutely! It looks good for here right now but as we all know the risk could slip south or north with less than 48 hours notice. I’m not counting my chickens quite yet. 



Manchester City Centre, 31m ASL

Brian Gaze
06 December 2017 08:41:59


A more notable event would be your omitting the phrase modern era from one of your posts. No sign on any of the models of that.


Originally Posted by: Downpour 


A more notable event for you will be the deletion of your account.


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
Solar Cycles
06 December 2017 09:09:07


 


Absolutely! It looks good for here right now but as we all know the risk could slip south or north with less than 48 hours notice. I’m not counting my chickens quite yet. 


Originally Posted by: Joe Bloggs 

Indeed, however I still think the low will be centred further south than currently projected with the snow line receding southwards with it. From an IMBY perspective I think we’ll do quite well out of this though and more so if the low on Sunday is a bit further south thus stopping any Atlantic air getting into the mix.

Maunder Minimum
06 December 2017 09:23:23


Indeed, however I still think the low will be centred further south than currently projected with the snow line receding southwards with it. From an IMBY perspective I think we’ll do quite well out of this though and more so if the low on Sunday is a bit further south thus stopping any Atlantic air getting into the mix.


Originally Posted by: Solar Cycles 


In these situations, you cannot be sure it will snow until you look out of the window and see that it actually is. I recall a huge disappointment from the 1980s (not sure exactly which winter) when heavy snow was forecast for the West Midlands for the next day - but when the next day arrived, it was just sunny and cold all day. My Aunt who lives in Bristol got snowed in - yet they had been forecast only rain. Proved to me that these marginal situations are very very hard to forecast with any accuracy, even 12 hours ahead - a difference of only 100 miles can lead to disappointment or joy.


New world order coming.

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