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Russwirral
06 February 2020 23:12:49
A very disturbed and edying looking atlantic into FI.... however the jet on tonights run runs on more of a southerly track. Cold rain for most, but progressively colder by the looks.

Polar HP moving into a GH towards the end...


A very different looking GFS than we have grown used to recently

Chiltern Blizzard
06 February 2020 23:17:38
Haven’t been paying much attention to models this winter, but 18z GFS is
certainly at variance the very strong signal for spring-like output in FI over the past few days! Cold, raw and potentially wintry
Rendlesham, Suffolk 20m asl
tallyho_83
07 February 2020 00:00:06

Haven’t been paying much attention to models this winter, but 18z GFS is
certainly at variance the very strong signal for spring-like output in FI over the past few days! Cold, raw and potentially wintry

Originally Posted by: Chiltern Blizzard 


Yes agree! Past few days we were looking at potential heatwave end and a major warm up in the FI range but now hopes have been dashed - I wonder what the ECM tomorrow will show


 


RECENT 18z ENS:



 


THE 00z ENS:



 


Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
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BJBlake
07 February 2020 00:41:17
Weirdly the mothern hemispere 18z map is different from the Europe
Brecklands, South Norfolk 28m ASL
Argyle77
07 February 2020 01:16:17
Well spring is approaching so the fact gfs is suggesting a more wintry outlook now, should not be much of a surprise lol
ECM might also be showing something similar in the days ahead.
BJBlake
07 February 2020 06:46:14
Yes - still showing a massive change on the GFS, but downgraded from last night's output to snow-on-hills level of cold. However, the scatter of Ps is symptomatic of the model uncertainty. It's a hint of change and that at least is to be celebrated after a winter of discontent for coldies.

P9 I'd take and what about p13, that must be polar maritime maximum volume at the end of the run!! However, several ps show a return to Atlantic conveyor belt, so it may be another false dawn, but time may be on our side now, because the QBO must be due to turn negative now, so a pattern change will come near the end of Feb, I am sure of it. It may be late, but I have had some fun cold spells in March, with 4 inches of level snow on low ground, raging snow showers on a NE wind and a set up not unlike it is showing at the end of the run - but colder.
Brecklands, South Norfolk 28m ASL
Surrey John
07 February 2020 07:00:01
Looks like the snow row on London ensembles has gone to 19 (out of 23) in 4 days time

Probably be sleet, but nearest to any wintery precipitation I have seen suggested down here all winter


Bradford on Avon, Wiltshire
35m ASL
DEW
  • DEW
  • Advanced Member
07 February 2020 07:06:42

A week of wild Atlantic weather coming up. Storm Ciara widely forecast (945mb, Norway, Mon) but then there's son and daughter of Ciara to come, either of which could generate further damaging gales, smaller LP centres bu closer (Thu, 970mb, off N Ireland; Sat, 960 mb much the same place). Even the HP which grudgingly settles in by Wed 20th is interrupted by another small LP on Sat 22nd over E Scotland - but at leas the 925mb (sic) low over Labrador on that day doesn't seem to be coming our way.


ECM plays down the successor LPs and leaves out the Sat one entirely, in fact showing the following week's HP in position over W Europe by then.


I don't see any 'proper' wintry weather in these charts, unless you want to settle for NW gales as a consolation prize for a really cold easterly.


ENS - wet in the west, less so in the east, but bits and pieces of rainfall persisting throughout the forecast period (to 23rd), not as dry as suggested yesterday. Mild at first, then cold spell,say 2C below normal, to Wed 13th; thereafter somewhat above normal for 4 or 5 days in the south, else generally close to normal with the usual scatter. The ultra mild forecasts of a day or two back have been jettisoned.


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

Chichester 12m asl
BJBlake
07 February 2020 07:34:52


A week of wild Atlantic weather coming up. Storm Ciara widely forecast (945mb, Norway, Mon) but then there's son and daughter of Ciara to come, either of which could generate further damaging gales, smaller LP centres bu closer (Thu, 970mb, off N Ireland; Sat, 960 mb much the same place). Even the HP which grudgingly settles in by Wed 20th is interrupted by another small LP on Sat 22nd over E Scotland - but at leas the 925mb (sic) low over Labrador on that day doesn't seem to be coming our way.


ECM plays down the successor LPs and leaves out the Sat one entirely, in fact showing the following week's HP in position over W Europe by then.


I don't see any 'proper' wintry weather in these charts, unless you want to settle for NW gales as a consolation prize for a really cold easterly.


ENS - wet in the west, less so in the east, but bits and pieces of rainfall persisting throughout the forecast period (to 23rd), not as dry as suggested yesterday. Mild at first, then cold spell,say 2C below normal, to Wed 13th; thereafter somewhat above normal for 4 or 5 days in the south, else generally close to normal with the usual scatter. The ultra mild forecasts of a day or two back have been jettisoned.


Originally Posted by: DEW 


 


yes your quote from Samuel Pepys seems like the best plan next week...


ECM is broadly in alignment with the GFS to 240 hours, and it's only after in the GFS that there is much of pattern change interest - but it's FI and a flakey FI with little back up from other pertabations. 


Brecklands, South Norfolk 28m ASL
ballamar
07 February 2020 10:58:36
GFS run could bring some surprise heavy snowfalls to more Northern areas. Bit colder towards the end but too late for a decent Northerly for the south - needs 850’s a lot lower. -15 would just about cause ice day
Chiltern Blizzard
07 February 2020 11:29:05

needs 850’s a lot lower. -15 would just about cause ice day

-15 850s should easily cause an ice day in mid-Feb.... We had -3c maxes only a few miles inland from the coast here in early March 2018.


 


Edit: though that was an easterly. A clear skied northerly would be different


Rendlesham, Suffolk 20m asl
Brian Gaze
07 February 2020 12:09:22
We've seen long fetch northerlies bring close to average max daytime temps in the south.
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Berkhamsted
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Russwirral
07 February 2020 12:30:14

GFS run could bring some surprise heavy snowfalls to more Northern areas. Bit colder towards the end but too late for a decent Northerly for the south - needs 850’s a lot lower. -15 would just about cause ice day

Originally Posted by: ballamar 


 


I would take this run with a pinch of salt, there seems to be a lack of consistency on general detail.


 


However, what we have seen over the past few days are GFS runs we would consider more in line with a winter looking run.  By that i mean more of a mix of real cold air, than the occasional slight incursion.


 


I think the charts are onto something, whether that be an overall pattern change away from the sustained milder weather weve had this winter, or actually, maybe something a bit more wintry severe.  Theres been a host of options apppearing over the past few days.  Mostly centred around LPs running across the UK at various lattitudes with snow on the northern edge.  IF this comes off, the winter will be very polarised for some, with no cold weather or snowfall all winter then 8" overnight one random night.


 


Hopefully we see the realization of these scenarios soon.  Weve had some dire winters in my time, but this one is up there top 3 at least.


Rob K
07 February 2020 12:30:42

We've seen long fetch northerlies bring close to average max daytime temps in the south.

Originally Posted by: Brian Gaze 


Yes I'm not sure how but the British landscape seems to have an amazing warming effect on any cold air flowing over it. Probably all the chip shops.


GFS just teasing us with a heavy Valentine's day snow event for the south on the 06Z too...


 



 


I have a job interview that morning 


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
idj20
07 February 2020 17:14:02

Looks like storm round II for post Valentine weekend going by GFS 12z. However that is subject to change given the time frame along with whether ECM go with a similar output in it's 12z output.

Getting this feeling of "what have we done to deserve this?" after such a snow-free winter at this end.   

Update: And indeed, a very different look in ECM with high pressure being nearer to us in from the south  . . . and I'd take that over GFS and hope the latter does follow suit in subsequent runs.


Folkestone Harbour. 
Stormchaser
07 February 2020 19:57:02

 
 


 


An impressively strong signal here for another unusually strong Euro High development in response to the warm air being thrown across at the upper levels (it stagnates, cools, then sinks down over W. Europe). Potential for more exceptional temperatures - challenging records of which some were set just 2 or 3 days ago.


Then we have this from GFS (left).


 


Which is different, to say the least!


Even it's own ensembles are markedly different, much more in line with the rest of the deterministic models.


I'm actually a bit baffled as to what's causing the GFS to persistently produce such a different outcome now, having been in line with the other models and ensembles up to the 00z of yesterday. There's an almighty standoff going on between it and the rest of the top-5 best-performing models!


It's reasonable to expect that it's off on one - but given that it has a core that was upgraded only a year ago, I'm not inclined to fully write it off. It'll be one heck of a victory if it's right to keep the Euro High at bay! Stormy UK notwithstanding (much variability from the model with that).


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Keep Calm and Forecast On
Jason H
07 February 2020 20:00:50


 


 


ECM not playing ball, this evening's 240hr chart is as ugly as sin.


Originally Posted by: Rob K 


All the years I've been on here and people still look at the 240 charts. It's all alchemy by this time frame.


I feel great! so maybe I might just
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Then maybe I'll stay alive

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lanky
07 February 2020 20:56:17


 


All the years I've been on here and people still look at the 240 charts. It's all alchemy by this time frame.


Originally Posted by: Jason H 


They certainly demonstrate the difference between accuracy and precision


Martin
Richmond, Surrey
NickR
07 February 2020 22:09:56
I know the focus is all on the wind, but there is a lot of snow on these charts next week for W Ireland in particular, and also W parts of Britain.
Nick
Durham
[email protected]
Zubzero
08 February 2020 01:15:10

I know the focus is all on the wind, but there is a lot of snow on these charts next week for W Ireland in particular, and also W parts of Britain.

Originally Posted by: NickR 


There is? Don't let the precipitation type charts mislead you, unless you are on top of a hill or on the mountains of Scotland any settling snow is unlikely.

Steve Murr
08 February 2020 05:52:19
Morning

21 days left of Feb - Chances of anything particularly wintry probably now below 10%
http://weatheriscool.com/ 

- Stratospheric jet heading towards record positive > Thats 21/21 ENS all above ave even with a negative bias.
NAO & AO both about to break records of positivity.

In terms of winter weather thats about as bad as you could get & as far as away as you could get from an Easterly or NE flow.

It will break down but final warming expected March means as mentioned over 2 week ago winters over in terms of the seasonal sense.
The final warming may bring cold in March however most people are more interested in warmth by then.
A proper tragic Winter then.
No snow in Jan for
London / lowland UK / Oslo / Stockholm.
NW Europe Mean Anomaly for Jan +3c 🤬
DEW
  • DEW
  • Advanced Member
08 February 2020 07:11:22

I suppose that with excessive cold in the Arctic and excessive warmth in these latitudes, the two would get together at some point and give us some stormy stuff, but GFS is just a procession.


Sun 9th 945mb Hebrides / Thu 13th 970mb Bailey / Fri 14th 950 mb Rockall (different centre, not a development from Thu) / Sun 16th 950 mb Caithness /Tue 18th 960mb Cairngorm / - brief ridge of HP - / Sat 22nd 945mb Faeroes all with the wind field extending well south and strongly too.


Temps as they say, 'academic' in the strong wind, though thermometers will be below normal around the 12th and (with the usual uncertainty) a couple of degrees above normal for the south after that while Scotland remains close to normal. Rainfall as you might expect mostly in N &W, snowfall apart from a briefly higher probability around the 12th not very likely except in the far north. Wait until the storms have blown themselves out before walking on Cairngorm!


ECM is less brutal and leaves out a separate storm on Fri 14th and indeed has a ridge of HP at that point; but still shows plenty of disturbed weather - Sun 9th, Thu 13th 980mb, Mon 17th 960mb


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

Chichester 12m asl
David M Porter
08 February 2020 09:16:40


 


There is? Don't let the precipitation type charts mislead you, unless you are on top of a hill or on the mountains of Scotland any settling snow is unlikely.


Originally Posted by: Zubzero 


BBC Reporting Scotland yesterday mentioned the possibility of snow falling at lower levels in some parts of Scotland too during next week, if my ears heard what was said correctly.


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
JACKO4EVER
08 February 2020 09:20:12


 


BBC Reporting Scotland yesterday mentioned the possibility of snow falling at lower levels in some parts of Scotland too during next week, if my ears heard what was said correctly.


Originally Posted by: David M Porter 


amazing really,,,, given its winter and all that 😉

moomin75
08 February 2020 09:24:26


 


BBC Reporting Scotland yesterday mentioned the possibility of snow falling at lower levels in some parts of Scotland too during next week, if my ears heard what was said correctly.


Originally Posted by: David M Porter 

I don't think a few flakes of snow in Scotland in February is going to rescue this pitiful winter David.


I think even you might start to agree with my expectations from early in the winter that this one has been a write off??


Witney, Oxfordshire
100m ASL

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