Jiries
18 September 2022 12:11:55

Originally Posted by: idj20 


Looking at the medium range outputs, it seems I've gone from needing the rain to having had enough of and now going back to needing it again! Our climate seems to have become inconsistent.



We will be seeing lot of sunshine even with northerly or NW the temperatures are not very cool so that will keep indoors warm from the sun.  Hope the low 20's later next week will not be the last but to see once more again in October, not seen a decent warm day in October since 2011.  Rain can stay away as long as possible.

tierradelfuego
18 September 2022 18:11:00
The 12z Op shows a lot of usable weather around, nothing too cold, but nothing too warm either. A few days around 20c max in the south but generally mild nights until then end of the run, when nights turns cooler.

Obviously given this weekend was supposed to be mins of 6/7c (keeping the house warm, if you think that does) and even southern England recorded 1c in favourable spots, it doesn't look great for keeping the house warm from an FI perspective, but not horrendous either...
Bucklebury
West Berkshire Downs AONB
135m ASL
Devonian
18 September 2022 18:22:26

Originally Posted by: Jiries 


 


We will be seeing lot of sunshine even with northerly or NW the temperatures are not very cool so that will keep indoors warm from the sun.  Hope the low 20's later next week will not be the last but to see once more again in October, not seen a decent warm day in October since 2011.  Rain can stay away as long as possible.



And odd view, given it's vital to life. But, hey, water comes out of taps...


It looks like being dry for the foreseeable - 2/3 weeks. The drought is back...


"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19
tierradelfuego
18 September 2022 18:28:44

Originally Posted by: Devonian 


The drought is back...



 


Or never went away for some, obviously location dependent. 


Bucklebury
West Berkshire Downs AONB
135m ASL
Devonian
18 September 2022 19:42:10

Originally Posted by: tierradelfuego 


 Or never went away for some, obviously location dependent. 



I rekon. In Essex mostly it seems, going by some data I've seen anyway.


We've had about 100mm of (often steady) rain this month but I bet it's still dust a foot or two down and for many feet further down.


Whatever, normal synoptic service is still absent. Western Europe is dominated by high pressure, again.


"When it takes nearly 900,000 votes to elect one party’s MP, and just 26,000 for another, you know something is deeply wrong."

The electoral reform society, 14,12,19
Col
  • Col
  • Advanced Member
19 September 2022 06:19:38

Originally Posted by: tierradelfuego 


 


 


Or never went away for some, obviously location dependent. 



Or never even existed for others, depending on location of course.


Col
Bolton, Lancashire
160m asl
Snow videos:
http://www.youtube.com/channel/UC3QvmL4UWBmHFMKWiwYm_gg
DEW
  • DEW
  • Advanced Member
19 September 2022 07:07:05

WX temp summary can't settle to a consistent outlook. Although there's still a trace of warmth on W European coasts in week 1, the cooler air is back and in week 2 all the way down into Spain - any recovery is reserved for the area near the Black Sea. In week 2 even some little patches of <0C (and that's a day-night average) in Iceland and Norway's Hardangervidda. Rain in week 1 heaviest on N Atlantic and also patchily across Europe; in week 2 fairly solidly across W Europe with Britain on the edge of the heaviest.


GFS Op - HP drifting E -wards and decaying by Fri 23rd to be replaced by HP on Atlantic generating a variety of NW/N/NE winds until Wed 5th when it finally moves E to Britain. Strongest N-lies associated with LP E of Shetland 985mb Tue 27th and again 995 mb Mon 3rd. 


ECM - a similar sort of pattern but the HP is closer in at first so N-lies don't start until after Mon 26th and then the LP is less deep so slack NW-lies  developing on Thu 29th


GEFS - ens members agree on recovery of temps to norm briefly around Fri 23rd after which mostly below norm to Wed 5th (less certain in Scotland). Rain on and off from the 23rd (a lot more than yesterday's forecast for S).


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

Chichester 12m asl
Jiries
19 September 2022 07:10:02

Originally Posted by: Devonian 


 


And odd view, given it's vital to life. But, hey, water comes out of taps...


It looks like being dry for the foreseeable - 2/3 weeks. The drought is back...



Rain will come eventually but not now until clocks go back ward which usually become unusable outside but now need warmth and sunshine for heating stay off and reduce the boring Autumn type.  1995 was the shortest at 1 month only.  Anyway with models showing lot of HP we still see lot of moisture and greenery.  Any water table now wont drop anymore due to weak sun and no heat and easily recovered from rain and snow in winter.

DPower
19 September 2022 11:19:28
Another northerly being modelled in about a week's time as high pressure builds in the Atlantic and low pressure dropping south to the east of the UK. Getting low pressure to the east of the meridian has been nearly as rare as hen's teeth this last decade or more with a semi - permanent high - pressure cell
sitting over Europe blocking any west to east movement and sending mild southerly to south westerly winds up over the UK and northwest Europe and Scandinavia.
Hopefully this will be a prelude to what is to come over the coming months and will wipe away the bore fest of a winter we had to endure last winter.
The Beast from the East
19 September 2022 19:48:33

First taste of cold incoming. Looks like the boiler will have to come on



"We have some alternative facts for you"
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Quantum
20 September 2022 00:48:40


One of the most extreme ensembles, this could bring night time flurries to lowland scotland


This is about as rare as snow during June.


Twitter: @QuantumOverlord (general), @MedicaneWatch (medicane/TC stuff)
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.
Tim A
20 September 2022 06:59:28
Still a northerly blast on for next Monday/Tuesday but nothing too extreme, will test the resolve for those wanting to keep the heating off though.

Tim
NW Leeds
187m asl


DEW
  • DEW
  • Advanced Member
20 September 2022 07:02:10

WX temps still see-sawing; while generally cold air continues to occupy Europe (and some notably cold patches over Norway), week 2 now shows a resurgence of warmth from the SW to affect Spain, W France and S England. Rain for N & S Europe week 1, Britain in a damp middle of the sandwich, in week2 a very dry area Biscay and into France with rain around the periphery incl N Scotland.


Jet - nothing much at first, a blow from the N on Mon 26th, dying away, before a more traditional W-ly flow near N Scotland from Fri 30th.


GFS Op - current HP moving E and weakening while HP arises on Atlantic, strong enough to affect Britain until next weekend, after which it retires W-wards and opens the way for N-lies Mon 26th, not lasting as on Thu 29th the HP has shifted SE to France with Britain in a W-ly regime, indeed intensifying 1030mb Britain Tue 4th before moving back S. Fiona still at hurricane strength Labrador Thu 29th, breaking up and remnants running across Iceland to N Norway.


GEFS dropping back to cool for a week or more after a brief interlude at norm on Fri 23rd, though op & control take a different view from other ens members and offer a warm spell from Mon 3rd. Rain on and off from Fri 23rd in many ens members though not in Op. Scotland less consistent - temps generally cool but more up and down, and rain in bursts esp 23rd and 26th.


ECM makes more of Monday's N-ly, pushing a large amount of cold air S-wards to generate LP over France Wed 28th (note difference from WX) with NE-lies for Britain before bringing back HP block to the W of Britain Fri 30th with little sign of W-lies


 


 


 


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

Chichester 12m asl
Quantum
20 September 2022 08:11:40

This is what the T850hpa situation looks like for the coldest September day ever (29th 1915)



Its notably less extreme than many of the ensemble forecasts for the same day this year.


One to watch.


 


What do people know of Snow to low ground in September. I know its extrodinarily rare, and happens less reliably than in June.


 


Twitter: @QuantumOverlord (general), @MedicaneWatch (medicane/TC stuff)
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.
Brian Gaze
20 September 2022 08:16:35

Originally Posted by: Quantum 


This is what the T850hpa situation looks like for the coldest September day ever (29th 1915)



Its notably less extreme than many of the ensemble forecasts for the same day this year.


One to watch.


 


What do people know of Snow to low ground in September. I know its extrodinarily rare, and happens less reliably than in June.


 



I'd be surprised if that shows the lowest 850s recorded on a September day. I assume you're talking about 2m temps?  


Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
Quantum
20 September 2022 08:37:14

Originally Posted by: Brian Gaze 


 


I'd be surprised if that shows the lowest 850s recorded on a September day. I assume you're talking about 2m temps?  



Yeh, you are probably right about that.


But surely it still has potential.


Looking at the 1915 event doesn't show that much special aside from the relatively cold airmass. I imagine some front or something got stuck under it, but some models show that for 2022 too.


 


Twitter: @QuantumOverlord (general), @MedicaneWatch (medicane/TC stuff)
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.
Sevendust
20 September 2022 09:41:58

If you want decent cold in the south I remember 1975. This from Trevor Harley's site - The southerly tracking low sticks in my memory 


"The hot summer ended abruptly on the 12th with an intrusion of arctic air. It was very wet: September was one of only two wet months this year. The 13th was very wet in the south, with 50 mm of rain widespread, 75 mm on the north Kent coast, and 91 mm at Margate - accompanied by a severe NE gale. The temperature that day only reached 10C in London, and as low as under 9C in parts of the south east - this is the coldest day recorded so early in the second half of the year. The 14th was also a cold day. A tornado destroyed glass in Barnham (Sussex) also on that day. As the winds eased on the 15th, with arctic air and clear skies the temperature widely dipped across the SE to -3 C, and as low as -6.1C at Dalwhinnie. A cold night at Lagganlia in the Highlands: -6.2C on the 27th." 

Tim A
20 September 2022 09:48:24

Originally Posted by: Quantum 


This is what the T850hpa situation looks like for the coldest September day ever (29th 1915)



Its notably less extreme than many of the ensemble forecasts for the same day this year.


One to watch.


 


What do people know of Snow to low ground in September. I know its extrodinarily rare, and happens less reliably than in June.


 



September 19/20th 1919


NOAA_1_1919092018_1.png (959×770) (wetterzentrale.de)


From Trevor Harley: "There was even snow cover on low ground from northern England north and on higher ground in Wales and the southwest as well as high ground in the Midlands on the night of the 19-20th. The snow was 2" deep at Princetown in Dartmoor. Snow cover lasted on Snowdon for a week. This is probably the earliest snowfall date."


 


Tim
NW Leeds
187m asl


Gusty
20 September 2022 09:58:24

I can recall some very noteworthy cold maxima in the SE in late September 1993. 8's and 9's from memory. 


Will need to check.


Steve - Folkestone, Kent
Current conditions from my Davis Vantage Vue
https://www.wunderground.com/dashboard/pws/IFOLKE11 
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DEW
  • DEW
  • Advanced Member
20 September 2022 10:06:26

Originally Posted by: Sevendust 


If you want decent cold in the south I remember 1975. This from Trevor Harley's site - The southerly tracking low sticks in my memory 


"The hot summer ended abruptly on the 12th with an intrusion of arctic air. It was very wet: September was one of only two wet months this year. The 13th was very wet in the south, with 50 mm of rain widespread, 75 mm on the north Kent coast, and 91 mm at Margate - accompanied by a severe NE gale. The temperature that day only reached 10C in London, and as low as under 9C in parts of the south east - this is the coldest day recorded so early in the second half of the year. The 14th was also a cold day. A tornado destroyed glass in Barnham (Sussex) also on that day. As the winds eased on the 15th, with arctic air and clear skies the temperature widely dipped across the SE to -3 C, and as low as -6.1C at Dalwhinnie. A cold night at Lagganlia in the Highlands: -6.2C on the 27th." 



In the north, the Peak District hills could be seen from Manchester covered in white with this event; I would estimate snowfall down to about 300m.


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

Chichester 12m asl
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