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springsunshine
17 February 2020 21:23:03

Whether direct Arctic northerlies deliver or not is one point but another equally puzzling one is why have we not had any for a very long time. There seems to be have been no shortage of westerlies (which is unsurprising) and even a couple of beastly things but the Arctic northerly seems to have become extinct. For that reason there has been precious little snow here for the past decade. Staying on topic and based on the recent model output that does not look like changing imminently.

Originally Posted by: doctormog 


A bit like the mid winter easterly or any easterly in winter except for feb/march 2018.

doctormog
17 February 2020 21:36:57


 


A bit like the mid winter easterly or any easterly in winter except for feb/march 2018.


Originally Posted by: springsunshine 


Yes, if only it had been as recently as that.


BJBlake
18 February 2020 00:09:18


 


 


I think we've all had enough of experts.


 



Originally Posted by: Saint Snow 


Lol...Good old ironic humour. I'm sure Boris (Cummins), Putin and Trump would agree though. I fear they prefer the view of the mob to an expert. I'd rather listen to David Attenborougher than Trump when it comes to facts on climate change or anything environmental. 


Brecklands, South Norfolk 28m ASL
BJBlake
18 February 2020 00:16:29
Models show a predominance of yet more polar maritime chilly winds, passing storms, and mild sectors (no cuddly toy) on that Atlantic conveyor belt that never stops giving (crap).
Brecklands, South Norfolk 28m ASL
DEW
  • DEW
  • Advanced Member
18 February 2020 07:18:57

Models show a predominance of yet more polar maritime chilly winds, passing storms, and mild sectors (no cuddly toy) on that Atlantic conveyor belt that never stops giving (crap).

Originally Posted by: BJBlake 


Not sure I can better this; there's a bit of light at the end of the tunnel as the jetstream weakens a bit from 2/3 Mar after being strong throughout and with regular weekendMpep-ups. GFS  & ECM match this nicely with maximum cyclone activity at/near the weekends but finally a well-marked NP on Wed 4th Nar (1030 mb Cornwall). 


GEFS ens now agreeing on mild and dry spell for S until Tue 25th Feb after which intermittent rain and temps up and down, presumably varying with warm/cold sectors; timing varies with the different runs. In the N, temps up and down and more rain until 25th - consistent with being closer to the mild/cold boundary of Atlantic air.


'Postage stamps' in general the same as for many weeks and continuing, with a milder patch over the E Atlantic and UK, and cold (if any)either side.


 


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

Chichester 12m asl
Gandalf The White
18 February 2020 11:18:01


 


Think it was you Brian that made the observation that direct Arctic northerlies don't even deliver for us down here nowadays.


The atmosphere remains too mobile. Not even a whiff of a Scandi high and any suggestion of one this winter has only lasted a day in the outer reaches of FI.


'Funny' how when I joined this forum some time back I would have leapt at the chance of sledging. Now as I near my sixties that same prospect does not have the same reaction. After all these years of chasing holy grails, time is catching up. I'd be more likely to break a hip nowadays, silly old fool!


Originally Posted by: Phil G 


😀


Welcome to what I optimistically call 'middle age'....  I can empathise completely: I've gone from the excitement of "Oh, great, a decent snowfall" to a more pragmatic "Oh, the heating bill is going up."


😉


 


Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Gooner
18 February 2020 14:09:23

What a dreadful winter its been , saw a few flakes in a heavy downpour the other week .


I'm hoping the Easterly QBO might have some sort of influence next year .


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


David M Porter
18 February 2020 15:02:34


What a dreadful winter its been , saw a few flakes in a heavy downpour the other week .


I'm hoping the Easterly QBO might have some sort of influence next year .


Originally Posted by: Gooner 


Hi Marcus


I was wondering whether you or anyone else here knows what phase the QBO was in at this time in 2018 just before the Beast from the East struck? A month or two ago I recall reading on here that there was an easterly QBO during the early stages of last winter before it flipped westerly later on.


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
Steve Murr
18 February 2020 18:00:45


 


Hi Marcus


I was wondering whether you or anyone else here knows what phase the QBO was in at this time in 2018 just before the Beast from the East struck? A month or two ago I recall reading on here that there was an easterly QBO during the early stages of last winter before it flipped westerly later on.


Originally Posted by: David M Porter 


 


It was Easterly ( just ) @10HPA & Easterly all the way down however Westerly QBO was downwelling from the top down & wasnt far off the 10HPA layer.


 


https://acd-ext.gsfc.nasa.gov/Data_services/met/qbo/qbo.html

bradders
18 February 2020 22:32:39


 


Think it was you Brian that made the observation that direct Arctic northerlies don't even deliver for us down here nowadays.


The atmosphere remains too mobile. Not even a whiff of a Scandi high and any suggestion of one this winter has only lasted a day in the outer reaches of FI.


'Funny' how when I joined this forum some time back I would have leapt at the chance of sledging. Now as I near my sixties that same prospect does not have the same reaction. After all these years of chasing holy grails, time is catching up. I'd be more likely to break a hip nowadays, silly old fool!


Originally Posted by: Phil G 

 


I know what you mean, I`d like to try  sledging again,  but as i`m well into my 70s I don`t think there`s much chance of that. My Swiss style sledge is still in the loft though. Probably it`s next use will be by the Grandchildren.



Eric. Cheadle Hulme, Stockport.
David M Porter
18 February 2020 23:02:47


 


 


It was Easterly ( just ) @10HPA & Easterly all the way down however Westerly QBO was downwelling from the top down & wasnt far off the 10HPA layer.


 


https://acd-ext.gsfc.nasa.gov/Data_services/met/qbo/qbo.html


Originally Posted by: Steve Murr 


Thanks Steve.


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
tallyho_83
19 February 2020 01:56:02


 


Thanks Steve.


Originally Posted by: David M Porter 


Surely if you have a very cold stratosphere which is causing an exceptionally strong polar vortex and fast moving zonal westerly jet stream higher up - then surely an easterly QBO won't make any different? - it will sort of over-ride everything!!? Would it not?


We would need warmer stratosphere to have a weaker PV and this looks unlikely now for rest of the winter!!


I opened a thread about something similar but re A SSW.


Hope winter 2020/21 will deliver something wintry.


Even Russians and my Muskovite friends woke up to 6c this morning and this is in Moscow! CRAZY.


Back to Models - more of the same old borefest zonal crap! Small hits of drier weather toward end but with temperatures in stratosphere so cold still and the PV so strong I doubt that high pressure will build in a hurry and any ridge will get flattened.  We can only hope and still can't believe we are in the same weather pattern as we were in October 2019.


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


DEW
  • DEW
  • Advanced Member
19 February 2020 07:32:27

Meanwhile, what the chart makers can see is yet more westerlies - passing fronts at any time but with extra boost from LP Tue 25th Feb (955 mb off N Scotland) but brief ridge of HP Sat 29th Feb. ECM and GFS differ about an LP on 27th Feb, ECM making it a major feature through Shetland but GFS a shallow low across England. No strong development of HP later on as was suggested yesterday.


Western areas get the most rainfall especially week 1 http://www.wxmaps.org/pix/prec4


According to the GEFS ens, the S has a mild and dry spell until 25th then rain on and off and (with usual caveats about scatter)  temps around the seasonal norm. The N incl Scotland is only patchily mild to the 25th and the rain never really goes away.


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

Chichester 12m asl
Bugglesgate
19 February 2020 18:17:15


Meanwhile, what the chart makers can see is yet more westerlies - passing fronts at any time but with extra boost from LP Tue 25th Feb (955 mb off N Scotland) but brief ridge of HP Sat 29th Feb. ECM and GFS differ about an LP on 27th Feb, ECM making it a major feature through Shetland but GFS a shallow low across England. No strong development of HP later on as was suggested yesterday.


Western areas get the most rainfall especially week 1 http://www.wxmaps.org/pix/prec4


According to the GEFS ens, the S has a mild and dry spell until 25th then rain on and off and (with usual caveats about scatter)  temps around the seasonal norm. The N incl Scotland is only patchily mild to the 25th and the rain never really goes away.


Originally Posted by: DEW 


That explains  why the last post was 07:32 this morning ........ 


What a damn godawful winter


 


Chris (It,its)
Between Newbury and Basingstoke
"When they are giving you their all, some stagger and fall, after all it's not easy banging your heart against some mad buggers wall"
Gandalf The White
19 February 2020 19:25:02

Little by little the recent ECM runs have increased the hints of a 2-3 colder spell in the 7-10 day window.


Today's 12z has this for T+240, for example:



Location: South Cambridgeshire
130 metres ASL
52.0N 0.1E


Steve Murr
19 February 2020 20:58:20


 


Surely if you have a very cold stratosphere which is causing an exceptionally strong polar vortex and fast moving zonal westerly jet stream higher up - then surely an easterly QBO won't make any different? - it will sort of over-ride everything!!? Would it not?


We would need warmer stratosphere to have a weaker PV and this looks unlikely now for rest of the winter!!


I opened a thread about something similar but re A SSW.


Hope winter 2020/21 will deliver something wintry.


Even Russians and my Muskovite friends woke up to 6c this morning and this is in Moscow! CRAZY.


Back to Models - more of the same old borefest zonal crap! Small hits of drier weather toward end but with temperatures in stratosphere so cold still and the PV so strong I doubt that high pressure will build in a hurry and any ridge will get flattened.  We can only hope and still can't believe we are in the same weather pattern as we were in October 2019.


Originally Posted by: tallyho_83 


 


Remember the net flow we observe is a combination of the stratospheric & tropospheric forcing. In this winters case its almost a perfect couplet.


An Easterly QBO will increase the probability of upward energy flux to disturb the vortex.


This Winter a perfect storm of 'positive' global Teleconnections & a bulldozing stratosphere. 


This +EPO +WPO -PNA +NAO +AO + COUPLET to Strat is the signature of the Winter is over post from Late Jan. - Despite the stupid comments from the idiot poster at the time. Its born out to be true.


Next week the AO breaks the 2-3 week old record from the start of Feb 2020. Forecasts now of +6.6 AO breaking the new 6.31 Record. 


This will bring continued stormy westerlies > maybe enough cold in the system for some snow at elevation ....

Russwirral
19 February 2020 22:54:45
Yet another squall line forecasted for tomorrow.

Shall we remember this winter for squalls and no snow?
Northern Sky
19 February 2020 23:26:29
The 18z continues the unsettled chilly theme. Always signs of mid Atlantic amplification and always it gets squashed by the jet and a succession of lows spinning off the tip of Greenland.
Chilly but not much good for anything but the tops of the hills snow wise.
tallyho_83
20 February 2020 01:23:58


 


 


Remember the net flow we observe is a combination of the stratospheric & tropospheric forcing. In this winters case its almost a perfect couplet.


An Easterly QBO will increase the probability of upward energy flux to disturb the vortex.


This Winter a perfect storm of 'positive' global Teleconnections & a bulldozing stratosphere. 


This +EPO +WPO -PNA +NAO +AO + COUPLET to Strat is the signature of the Winter is over post from Late Jan. - Despite the stupid comments from the idiot poster at the time. Its born out to be true.


Next week the AO breaks the 2-3 week old record from the start of Feb 2020. Forecasts now of +6.6 AO breaking the new 6.31 Record. 


This will bring continued stormy westerlies > maybe enough cold in the system for some snow at elevation ....


Originally Posted by: Steve Murr 


Interesting re what you said about an easterly QBO! So let's see what next winter will bring!?


I heard that the Indian Ocean SST's was to blame for the exceptionally mild winter across Europe too!? Which I thought would never influence our weather here in Europe.


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


DEW
  • DEW
  • Advanced Member
20 February 2020 07:00:13

Jetstream still amazingly strong (will it ever give up?) - big powerful streak for Sun 23rd and then another go on Mon 2nd, that introducing a week in which it runs S of the UK so an indication of cold from the N; and then peps up again on Sat 7th across the UK. No surprise to see the western side of the UK getting deluged http://www.wxmaps.org/pix/prec4 and heavy rain taken south across France in week 2 i.e. matching the date of the 2nd above.


GFS shows westerlies continuing but with some of the LP centres which roll along in the flow coming further south and introducing spells of colder N/NW winds e.g. Wed  26th & Sat 29th & Thu 5th. The sequence finishes with a big dartboard low Sat 7th 945mb approaching from the west. The forecast has moved since yesterday to become stormier and often colder but not wintry except at elevation. ECM similar but with minor differences in timing, tending to be a day earlier in bringing storms through.


GEFS ens have a similar downgrade since yesterday, the 'mild' spell until Tue 25th less marked in the S and all but gone in the N, followed by a week with temps consistently though not enormously below the seasonal norm, and then from 1st Mar less agreement but more runs on the cold side than previously forecast. Precipitation now expected to be continual throughout.


Plenty of double-digit snow row figures to be found from the Pennines northwards, and even a few south of that; Inverness nearly every day above 20.


 


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

Chichester 12m asl
JACKO4EVER
20 February 2020 08:03:40
Excellent summary DEW, it wouldn’t take much for us to slip into some form of winter by stealth. Cool to cold zonality may creep up on us- a few surprise snowfalls could be on the cards if some of the later output verifies.
KevBrads1
20 February 2020 08:31:14

Uncanny charts and weather condtiions appearing almost similiar to what happened almost 25 years ago today.


An active cold front pushing SEwards as happened on 22nd February 1995.


 


And these two charts below. The first one heralding the cold zonal start to March 1995


 



 


 


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
ballamar
20 February 2020 09:02:12
Could be looking at the most interesting days weather for the SE this winter. Looks like it could get very lively this afternoon. Window watching weather
fairweather
20 February 2020 09:12:05


 


Think it was you Brian that made the observation that direct Arctic northerlies don't even deliver for us down here nowadays.


The atmosphere remains too mobile. Not even a whiff of a Scandi high and any suggestion of one this winter has only lasted a day in the outer reaches of FI.


'Funny' how when I joined this forum some time back I would have leapt at the chance of sledging. Now as I near my sixties that same prospect does not have the same reaction. After all these years of chasing holy grails, time is catching up. I'd be more likely to break a hip nowadays, silly old fool!


Originally Posted by: Phil G 


But when was it last put to the test? I can't remember the last time we had a true vertical direct northerly running all the way from The Arctic to south of us giving sub 528 dam. This then gave the hope of a polar low or a front diving south and bringing snow.


As for sledging, I really should be putting it out of mind at 70 with two replacement knees. Might get down the hill but probably not back up now! Certainly took my grandchildren when I was in my early sixties but it hasn't snowed enough here for several years now.


S.Essex, 42m ASL
David M Porter
20 February 2020 09:14:41


 


Interesting re what you said about an easterly QBO! So let's see what next winter will bring!?


I heard that the Indian Ocean SST's was to blame for the exceptionally mild winter across Europe too!? Which I thought would never influence our weather here in Europe.


Originally Posted by: tallyho_83 


Re the Indian Ocean SSTs, I seem to recall that not long before Christmas, one member commented in this thread about this and how it could have been having an effect on the weather patterns across Europe during this winter.


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

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