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Brian Gaze
18 March 2020 13:13:28

GEFS has gradually erased the cold uppers in recent days. The world may be coming off the rails but the UK's weather continues as ever!


 



Brian Gaze
Berkhamsted
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Caz
  • Caz
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18 March 2020 15:03:26

The last thing we need right now is for winter to start. Let’s hope for some dry sunny days to brighten our days.  


Market Warsop, North Nottinghamshire.
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briggsy6
18 March 2020 17:23:55

A heatwave would be good to hopefully dampen down the virus. 


Location: Uxbridge
DEW
  • DEW
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19 March 2020 07:00:57

Jet stream as previously forecast splitting into two but northerly branch ore dominant and closer to Scotland until Thu 28th when the energy goes south and runs through the Med. The last frame Sat 4th shows it returning to UK.


GFS0z has the forecast HP traversing the UK and up to Scandi 1035 mb Sun 22nd and then develops ridge to E Russia over the following week to Sat 28th (yesterday's forecast northerly plunge over central Europe shown on GFS and BBC has gone much further east) and SE winds for UK with occsional embedded troughs for UK in that time. HP then works its way back to Iceland 1030mb Wed 1st with ridge to UK before the Atlantic resumes business as usual on Sat 4th.


ECM generally agrees but has the HP weaker by Thu 26th so not so much occasional embedded troughs as LP settling over UK around Fri 27th


As Brian points out above, GEFS temps flatlining (Plymouth notably so) with fairly good agreement between runs, mild around Tue 24th, cool from Fri 28th, a few rainfall spikes appearing from Mon 30th onwards in the S & E but rather earlier in the N & W


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

Chichester 12m asl
westv
19 March 2020 16:44:01

Is there are weather forum here too?!


 



At least it will be mild!
moomin75
19 March 2020 19:02:09
Not even the charts can cheer us up! Horrendous 12z ECM with suppressed temperatures and unsettled heading into April.
Witney, Oxfordshire
100m ASL
DEW
  • DEW
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20 March 2020 07:23:20

On GFS, HP dominates over the next two weeks. First it moves up into Norway then settles down as a ridge from Denmark E-wards Tue 24th with E-ly winds over UK (These cold at first but the extension E-wards cuts off the Arctic flow later). HP weakens by Sat 28th and the UK is under trough from Iceland to Iberia, but this gets pushed aside by HP from Atlantic 1030mb Scotland Wed 1st, which also moves off to the Baltic by Sun 5th with light SW-lies for UK.


ECM similar but trough on Sat 28th is deeper and further east with a distinct run of N-lies for a couple of days.


GEFS cool at first, mild around Tue 24th, mean of runs close to seasonal norm thereafter but with wide divergence by Sat 4th (as much as 10C above to 10C below in the S, op and control on mild side). Odd bits of rain from 1st April, some earlier spikes in north


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

Chichester 12m asl
Uncle Ted
20 March 2020 08:54:39
Thanks for these daily updates. Always my first look at the weather. Thank you for your clear and concise reading of the charts. V useful for those of us reliant on weather for work.
S
140m asl overlooking Gleneagles Hotel (home of the Ryder Cup 2014) in the Ochils,Perthshire
AJ*
  • AJ*
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20 March 2020 09:24:01

On the GEFS for London there is a notable lack of rainfall spikes, until April (which can easily change seeing as how far into the future it is).  But no matter what the temperature, At Least It Will Be Dry.


Angus; one of the Kent crew on TWO.
Tonbridge, 40m (131ft) asl
GezM
  • GezM
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20 March 2020 11:44:21


On the GEFS for London there is a notable lack of rainfall spikes, until April (which can easily change seeing as how far into the future it is).  But no matter what the temperature, At Least It Will Be Dry.


Originally Posted by: AJ* 


Thank God for that! And if the sun shines it generally won't feel too bad. Lord knows we need a bit of sunshine right now 


Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
DEW
  • DEW
  • Advanced Member
21 March 2020 06:52:10

Jetstream now showing close to NW Scotland for first half of week (too close for comfort?) but fragmenting completely by Sat 28th. Then a weaker branch over N Norway and a stronger one close to S Britain in the following week, eventually moving away S-wards by Sat 5t


GFS 0z has present HP moving to Baltic  1040 mb by Tue 24th, ridge to UK with SE winds in S and SW winds in N. A shift in the position of the ridge allow LP from south to drift up over UK Sat 28th, reinforced Wed 1st by HP block over Iceland. After that, the situation is messy, with the UK under a broad col, LP to E & W, HP to N & S.


ECM in general agreement, though shows a stronger link between local LP on Sat 28th with trough extending up to Arctic, could turn out colder that way.


GEFS mild 23rd - 25th, cool 26th - 1st, after that around the seasonal norm with less scatter than yesterday, Very dry to start with except NW Scotland & NI; rainfall spikes start appearing  earlier than yesterday, from 27th in S and 25th in NW but vary between runs and many runs stay dry for longer.


 


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

Chichester 12m asl
Gusty
21 March 2020 08:50:46

Check out the ECM at 192 hours at the months end !



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DEW
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22 March 2020 07:07:17

GFS 0z much as yesterday, HP settling over Baltic with ridge to UK all the coming week, winds mostly from SE. That HP declines a little Sun 28th allowing elongated trough Svalbard to Italy to bring colder N-lies. After hanging about in a rather uncertain fashion, the trough gives way to HP from Atlantic Wed 1st 1020 mb Wales. Then we get a repeat with HP establishing over Scandi with ridge to UK Sun 5th and at the end of the run, another trough with northerlies, more potent this time (the HP has gone away and parked itself over Iceland)


ECM is rather more certain and shows defined LP with 1000 mb centre in the N Sea Tue 31st but until then agrees with GFS


GEFS mild (+5 C wrt norm) 24th, coldish (-5 C) 29th, mean back to norm on 1st but with quite a lot of divergence from that date (up to +/- 10C), sporadic rainfall from 29th in some runs


Drier for the next two weeks than previously shown on http://www.wxmaps.org/pix/prec4 (not that there was much rain about anyway, the small patch that was over us has moved off to Denmark)


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

Chichester 12m asl
Gooner
22 March 2020 18:47:48


That's rather chilly from ECM


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
22 March 2020 18:49:12


A heatwave would be good to hopefully dampen down the virus. 


Originally Posted by: briggsy6 


That's not proven  the moment


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
22 March 2020 19:17:04


Should have been here in January 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


moomin75
22 March 2020 19:19:43



Should have been here in January 


Originally Posted by: Gooner 

Typical! What's the betting this verifies perfectly!!


Witney, Oxfordshire
100m ASL
David M Porter
22 March 2020 19:40:55



Should have been here in January 


Originally Posted by: Gooner 


I wonder is this could be a sign of the NAO moving from the positive phase it was in right through the winter to a negative one. I seem to recall one or two people back in January predicting that this would happen as we moved into spring.


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
moomin75
22 March 2020 19:59:43


 


I wonder is this could be a sign of the NAO moving from the positive phase it was in right through the winter to a negative one. I seem to recall one or two people back in January predicting that this would happen as we moved into spring.


Originally Posted by: David M Porter 

Including yours truly 🙃☺


Witney, Oxfordshire
100m ASL
Gooner
22 March 2020 21:18:12


Including yours truly 🙃☺


Originally Posted by: moomin75 


Yes you did IIRC 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


David M Porter
22 March 2020 22:15:06


Including yours truly 🙃☺


Originally Posted by: moomin75 



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
22 March 2020 23:42:49

Are the ENS picking up on this SSW occurring now as many ENS are going to -10c @ 850hpa with now the op being the milder run!? - Looks like there will be a tropospheric response!? Or is this too early to tell and maybe this is because the PV is weaker in general? -Either way it will turn colder and there is no sign of any warm springlike weather from midweek looking at the 18z ENS for London.


A pity this never happened in January but oh well. 


 



Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
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johncs2016
23 March 2020 00:10:49


Are the ENS picking up on this SSW occurring now as many ENS are going to -10c @ 850hpa with now the op being the milder run!? - Looks like there will be a tropospheric response!? Or is this too early to tell and maybe this is because the PV is weaker in general? -Either way it will turn colder and there is no sign of any warm springlike weather from midweek looking at the 18z ENS for London.


A pity this never happened in January but oh well. 


 



Originally Posted by: tallyho_83 


I agree with that which is why this ongoing SSW is occurring far too late in my books. As we saw in the winter of 2018/19, we still wouldn't have been guaranteed a tropospheric response to this SSW event if it had occurred during the winter, but we would at least have been in with a chance of such a response if that had been the case


One thing which is interesting me though, is that just about all of the short-term models are now pointing towards northern blocking appearing at some point in time but in response to that, I have to ask the question of where on Earth was this northern blocking during the winter when we were actually looking for it (at least, those of us who like to see some cold and snowy weather during the winter)?


The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.
DEW
  • DEW
  • Advanced Member
23 March 2020 06:45:57

Dry but northern cold making a re-appearance in week 2 http://www.wxmaps.org/pix/temp4


GFS has Baltic HP all week with S/SE winds (some rain brushing NW) then Sat 28th twin centres of HP in Atlantic and Russia leave UK in a weak trough with some cold air filtering down from N; the Atlantic high develops NE-wards with a spell of E/NE winds the following week. Finally a vicious N-ly blast Sun 5th affecting Scandi and Germany, just missing UK which is still dominated by HP by then centred over Scotland.


FAX has weak front embedded in the HP this week moving slowly S so it won't be wall-to-wall sunshine for everyone


ECM much the same but links the E/NE winds to an Arctic source so colder than GFS


GEFS mild 24th Mar, cold 29th Mar (colder than yesterday 7C below norm), mostly recovering to norm 3rd April. Dry, less rain than yesterday's forecast, perhaps a little around Thu 2 Apr for the S or 27th Mar for the N


 


For reasons set out in the Forum Arms Daily Thread these summaries may be posted irregularly in the coming week. Normal service (virus permitting) resumes Tue 31st


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

Chichester 12m asl
Quantum
23 March 2020 15:41:14

Seems like we could see the coldest airmass of the entire 'winter' next week. Would not rule out some late march or early April snow.


 


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.

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