Gooner
06 October 2020 18:12:22

Be happy with this sort of set up through Winter


 



Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Brian Gaze
06 October 2020 20:56:10

GEFS 35 day plots will be appearing on TWO very soon. Sample 850hPa plots below. 


1) The 35 day cycle takes NCEP approx 24 hours to complete. Therefore, updates on TWO will prob appear at about 7am with initiation the previous day. (So the plots below initiating on Mon 5th October are currently the latest)


2) The red shading shows the standard deviation which gives a measure of the spread. I can show all the individual ensemble members like on the 16 day charts but haven't yet decided whether it is worthwhile 


 



 



 


 


Brian Gaze
Berkhamsted
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"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan
DEW
  • DEW
  • Advanced Member
07 October 2020 06:51:37

Jetstream - A more or less W-E flow across the UK for the rest of this week before loops develop, over the N Sea Sat 10th with N-ly across UK with the loop moving off to the Med as a cut-off by Tue 13th. By that time jet is fragmented around the UK until new loop develops on Atlantic Sat 17th with benefit of S-ly flow before forming a cut-off over Ireland Tue 20th, this time broadening out rather than moving away Thu 22nd. Another big loop waiting over Greenland then.


FAX shows detail of what other forecasts agree on, namely that the wave tomorrow Thu will deepen and run across C England but more intense so rain affects all areas to the S. Any wave on Friday passing through quickly on the following NW-ly.


GFS - has recanted from yesterday and shows more interest in a ridge of HP in the Atlantic hanging on and sometimes properly across the UK but being nibbled at all the time, first LP over SE/Low Countries Tue/Wed 13th/14th (cf ECM yesterday) then Atlantic LP W of Ireland Sat 17th with centres at various times from SW Approaches to Hebrides during the following week.


GEFS - like yesterday, average temp and wet in the S now, becoming cool everywhere and slowly recovering to norm by Mon 19 Oct (slower recovery than yesterday and plenty of variation between runs). Brief dry period around Sun 11th after which frequent but not intensive rain throughout. In the N  cool and dry  now but back to norm sooner (Tue 13th) and dry period briefer, some bigger rainfall totals in some runs thereafter.


ECM - like GFS (but GFS has caught up with ECM rather than leading it)


 


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

Chichester 12m asl
Russwirral
07 October 2020 09:23:42

Originally Posted by: Brian Gaze 


GEFS 35 day plots will be appearing on TWO very soon. Sample 850hPa plots below. 


1) The 35 day cycle takes NCEP approx 24 hours to complete. Therefore, updates on TWO will prob appear at about 7am with initiation the previous day. (So the plots below initiating on Mon 5th October are currently the latest)


2) The red shading shows the standard deviation which gives a measure of the spread. I can show all the individual ensemble members like on the 16 day charts but haven't yet decided whether it is worthwhile 


 



 



 


 



 


Easier on the eye Brian, I like it.


 


The only issue will be in the winter when we get a crazy outlier of +10*c or similar which might not paint an alternative cluster picture.


Saying that I prefer this look to the other.


Saint Snow
07 October 2020 09:51:53

Originally Posted by: Brian Gaze 


GEFS 35 day plots will be appearing on TWO very soon. Sample 850hPa plots below. 


1) The 35 day cycle takes NCEP approx 24 hours to complete. Therefore, updates on TWO will prob appear at about 7am with initiation the previous day. (So the plots below initiating on Mon 5th October are currently the latest)


2) The red shading shows the standard deviation which gives a measure of the spread. I can show all the individual ensemble members like on the 16 day charts but haven't yet decided whether it is worthwhile 


 



 



 


 



 


 


Is there no line for the operational? Or am I missing something?



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
Brian Gaze
07 October 2020 11:12:02

Originally Posted by: Saint Snow 

 


Is there no line for the operational? Or am I missing something?



Two reasons why it's not there:


1) The op run currently only goes out to 16 days 


2) Because the 35 day run only appears with the 00z cycle  and it takes 24 hours to complete there would be consistency issued with showing the GFS op run even out to 16 days, e.g. would it be today's 00z op run or yesterday's as that would match up with the GEFS data sets


However, the op run will continue to appear on the 16 day plots which update 00,06,12 and 18z, e.g.


https://www.theweatheroutlook.com/twodata/gefs.aspx?run=na&lg=850&lglocation=london&charthour=006&chartname=ps_500hpa&chartregion=na-region&p=1&charttag=PS%20500hPa%20(GPDM)


 


 


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
Gooner
07 October 2020 12:55:26

Big outlier but nice to see blocking



Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


The Beast from the East
07 October 2020 13:28:18

Not sure if this has already been mentioned


 




"We have some alternative facts for you"
Kelly-Ann Conway - special adviser to the President
Brian Gaze
07 October 2020 14:45:14

On the subject of ECM 


 




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
Brian Gaze
07 October 2020 14:59:19


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
Saint Snow
07 October 2020 15:27:50

Originally Posted by: Brian Gaze 


 


Two reasons why it's not there:


1) The op run currently only goes out to 16 days 


2) Because the 35 day run only appears with the 00z cycle  and it takes 24 hours to complete there would be consistency issued with showing the GFS op run even out to 16 days, e.g. would it be today's 00z op run or yesterday's as that would match up with the GEFS data sets


However, the op run will continue to appear on the 16 day plots which update 00,06,12 and 18z, e.g.


https://www.theweatheroutlook.com/twodata/gefs.aspx?run=na&lg=850&lglocation=london&charthour=006&chartname=ps_500hpa&chartregion=na-region&p=1&charttag=PS%20500hPa%20(GPDM)


 


 



 



 


No probs, I just wondered (there's a control run shown separately) 



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
Heavy Weather 2013
07 October 2020 15:42:29

Originally Posted by: Brian Gaze 





Brian - thanks for your time and effort on this. Super useful for the winter ahead. The new ensembles have been hard to get used to so this is a great tool.


Mark
Beckton, E London
Less than 500m from the end of London City Airport runway.
Brian Gaze
doctormog
07 October 2020 18:02:29
These are really nice additions Brian and will give an interesting insight into the model’s performance in the coming season(s).
Russwirral
07 October 2020 18:08:22
Back to the charts, and its great to see some blocking pop up. Some of these charts if they were say another 6 weeks ahead would be pretty wintry...

But its not that cold yet, and I reckon we will have a very cold, windy and damp end to Autumn. close but no cigar situation...
White Meadows
07 October 2020 19:15:11

Originally Posted by: Russwirral 

Back to the charts, and its great to see some blocking pop up. Some of these charts if they were say another 6 weeks ahead would be pretty wintry...

But its not that cold yet, and I reckon we will have a very cold, windy and damp end to Autumn. close but no cigar situation...


Agreed. 
Some classic blocking hints on the 12z

Gooner
07 October 2020 19:23:11

240 GFS 



300 GFS



384 GFS



lots of blocking around as mentioned - seems to tie in with the lack of zonal winds as Gav has mentioned and per Tally's post 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Gooner
07 October 2020 19:25:02

ECM 240 Shows the blocking that's in agreement with the Met update 



Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


White Meadows
07 October 2020 21:35:14
No hurricane this year then! 🤣
DEW
  • DEW
  • Advanced Member
08 October 2020 07:01:39

16-dayer keeps W Europe cool for the next couple of weeks, and arin to the west (esp the UK week 2). Big blob of blue appears over N Russia week 2 as well - winter on its way. http://www.wxmaps.org/pix/temp4


GFs - current LP passes by followed by that Atlantic ridge of HP as yesterday - but more short-lived than previously forecast with area of LP in N Atlantic affecting all UK Fri 16th moving steadily S past W Ireland to Spain over the following week, and S/SE winds for the UK (gales for the E Coast later)


GEFS - temps dropping off (in the S 7C below norm by Sun 11th) gradually recovering to norm by Fri 18th. Fair agreement to that point but although mean is still on the norm, uncerainty sets in with op & control amongst the warmest. Rain from ca Tue 13th increasing in probability, both frequency and amount, esp in S & W.


ECM - yesterday 12z looked like GFS does now but this morning's 0z takes a different course from Wed 14th with quite deep LP over Belgium that day gradually linking up with Atlantic to set up broad trough of LP France- Greenland by Sat 17th which on the Sun converges on the GFS model with the trough becoming localised off W Ireland.


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

Chichester 12m asl
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