GezM
  • GezM
  • Advanced Member
12 February 2021 10:29:38

Originally Posted by: Hippydave 


The signal for HP to build somewhere in the vicinity a few days after our breakdown remain strong this morning I see. 



That'll do me. I don't really care if it's mild or cold as long as it's dry (after the rain next week of course). I just couldn't stand a return to weeks of cold or warm rain. 


Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
Brian Gaze
12 February 2021 10:32:30

GFS again firing up the temperatures. It may even be possible to sit outside down here.  



 


 


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
four
  • four
  • Advanced Member
12 February 2021 10:34:38
Reminds me of 2019 which had several days in late Feb over 15C, despite a snowy start.
hobensotwo
12 February 2021 10:35:56

Originally Posted by: Ally Pally Snowman 


Probably Spring but outside chance of winter continuing.  I don't mind as long as we get one or the other. We dont want a boring halfway house. 



 



A couple of big dippers towards the end, which might be the start of a trend. It will be interesting to see if this carries weight into the 12z's.


I've got a feeling we haven't seen the end of winter yet.


It's been the longest winter period that I can remember without much of a zonal push, a very -AO/NAO winter.

Brian Gaze
12 February 2021 10:39:52

Detailed ECMP verification information is available here:


https://sites.ecmwf.int/ifs/scorecards/scorecards-47r2HRES.html


Red means the new version is worse than the control (I assume to be the existing operational). Blue means it is better.


It appears they've actually reduced from 64but to 32bit floating point numbers in the new version to free up computational power which provides for an increase in the number of levels (91 to 137) in the ensemble forecasts.


The new version is scheduled for 11th May and is now fully plugged into TWO here:


https://www.theweatheroutlook.com/twodata/ecmwfp.aspx


 


 


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
Quantum
12 February 2021 10:43:34

I'd expect all outliers to be completely gone on the 12z. There is still an outside chance as the trough had not yet developed at 6Z.


There is no chance of keeping cold if the 12Z is on board for mild though.


 


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.
ballamar
12 February 2021 10:46:26
Hints of an easterly akin to 2018 in the output. Was hoping for spring but if it can give a decent snow event....
Ally Pally Snowman
12 February 2021 10:48:11

Originally Posted by: ballamar 

Hints of an easterly akin to 2018 in the output. Was hoping for spring but if it can give a decent snow event....


Yes hints of Spring and then perhaps another Beast. The GFS 6z a carbon copy of the met office long range forecast. 


 


https://www.wetterzentrale.de/en/topkarten.php?map=1&model=gfs&var=1&time=300&run=6&lid=OP&h=0&tr=3&mv=0#mapref


 


Bishop's Stortford 85m ASL.
The Beast from the East
12 February 2021 10:48:50

Originally Posted by: Quantum 


I'd expect all outliers to be completely gone on the 12z. There is still an outside chance as the trough had not yet developed at 6Z.


There is no chance of keeping cold if the 12Z is on board for mild though.


 



A few good ones still there. Dont give up just yet!



"We have some alternative facts for you"
Kelly-Ann Conway - special adviser to the President
Whether Idle
12 February 2021 10:50:15

Originally Posted by: ballamar 

Hints of an easterly akin to 2018 in the output. Was hoping for spring but if it can give a decent snow event....


My appetite has been wetted.  Even the GFS now throwing an FI operational run out that takes us back into Beasterly Cold.


https://www.meteociel.fr/modeles/gfse_cartes.php?ech=312&code=code&mode=1&mode3h=0&runpara=0&carte=1


 


Dover, 5m asl. Half a mile from the south coast.
Saint Snow
12 February 2021 10:54:59

All models now firmed up that tomorrow's initial push will fizzle to the west of England, then Sunday's will be rain.


FFS. 



Martin
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
"How can wealth persuade poverty to use its political freedom to keep wealth in power? Here lies the whole art of Conservative politics."
Aneurin Bevan
The Beast from the East
12 February 2021 10:58:46

Originally Posted by: Ally Pally Snowman 


 


Yes hints of Spring and then perhaps another Beast. The GFS 6z a carbon copy of the met office long range forecast. 


 


https://www.wetterzentrale.de/en/topkarten.php?map=1&model=gfs&var=1&time=300&run=6&lid=OP&h=0&tr=3&mv=0#mapref


 



Wont be good for the plants and wildlife that will spring into life next week


March is often a cold month these days


"We have some alternative facts for you"
Kelly-Ann Conway - special adviser to the President
Gooner
12 February 2021 11:10:13


Not for me , lost all faith in Easterlies 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
12 February 2021 11:11:24


Pffffttttt means nothing 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Whether Idle
12 February 2021 11:14:52

Originally Posted by: Gooner 


 


Not for me , lost all faith in Easterlies 



A surprising show of weakness there Marcus.


Dover, 5m asl. Half a mile from the south coast.
Rob K
12 February 2021 11:19:23

Originally Posted by: Whether Idle 


 


A surprising show of weakness there Marcus.



To be fair easterlies are never likely to be great for his location, in terms of snow. As Brian has mentioned, the best snow for central parts often comes when the synoptics are just getting ready for an easterly....


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
Ally Pally Snowman
12 February 2021 11:19:35

Originally Posted by: The Beast from the East 


 


Wont be good for the plants and wildlife that will spring into life next week


March is often a cold month these days



 


Indeed, but I think this March has all the hallmarks of a cold one perhaps very cold.


Bishop's Stortford 85m ASL.
Quantum
12 February 2021 11:19:55

Originally Posted by: The Beast from the East 


 


A few good ones still there. Dont give up just yet!


 



I think they will either be gone or everywhere on the 12Z.


Can't keep hope going after a bad 12z.


 


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.
Quantum
12 February 2021 11:26:16

Trough is deeper than expected.


1011.9hpa vs 1012.5hpa


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
12 February 2021 11:30:30
https://www.wetterzentrale.de/maps/GFSOPEU06_324_1.png 
If that came off I would hope with more easterly than ENE or NE winds showers would penetrate further inland. Seems more of a classic Scandy High setup. Of course melting between showers and warm ground may still be an issue but I would jump at another chance of distruptive snow.
Tim
NW Leeds
187m asl


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