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GezM
  • GezM
  • Advanced Member
23 September 2020 09:23:36


12z GFS keeps us cool and unsettled up to the end of the first week of October 


The rain will do the gardens some good 


Originally Posted by: Gooner 


Looks very unsettled for the foreseeable. Even here the garden has dried out but we really just need a couple of spells of rain to fix that. The rest of the rain can stay away as far as I'm concerned. 


Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
xioni2
23 September 2020 18:28:58

Haven't seen it mentioned here, but starting with today's 12z run, GFS ensemble had a major upgrade:



  • 31 members (from 21)

  • higher horizontal resolution throughout (~25km)

  • The 00z run will extend to 35 days out daily

  • Runs will start ~one hour earlier and finish one hour later


These changes will probably make for a slightly better and less volatile ensemble model, but still not as good as the EC.

Brian Gaze
23 September 2020 19:02:09


Haven't seen it mentioned here, but starting with today's 12z run, GFS ensemble had a major upgrade:



  • 31 members (from 21)

  • higher horizontal resolution throughout (~25km)

  • The 00z run will extend to 35 days out daily

  • Runs will start ~one hour earlier and finish one hour later


These changes will probably make for a slightly better and less volatile ensemble model, but still not as good as the EC.


Originally Posted by: xioni2 


See a few posts above. 


https://www.theweatheroutlook.com/twocommunity/default.aspx?g=posts&m=1258080#post1258080


 


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
24 September 2020 06:54:01

So, reporting as things stand:


GFS - current Lp filling and moving to Germany Mon 28th (but rather more slowly than previously? so still affecting E coast) then sequence of LPs running NW-SE across or close to UK; 975 mb Thu 1st SW Ireland, 990mb Mon 5th Cornwall. After this HP builds strongly (and looks warm) 1035mb C England Sat 10th.


GEFS - temp recovering to norm ca Tue 29th and with usual variation between runs stays there to Sat 10th (no sign of warm spell at that time unlike parent GFS) Rain in E at first, otherwise dry until Tue 29th and then on and off for the forecast period esp around Fri  2nd


ECM - holds the controlling LP stationary and  further W for a while ca Thu 1st and pushes a secondary across N England, followed by an area of LP generally covering the UK Sat 3rd with a centre 980mb Kent Sat 3rd .


 


If (see Brian's post) GEFS is significantly delayed due to upgrade, I may not be able to provide a regular daily summary which includes it owing to care commitments. ECM (while BST applies) already presents a problem


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

Chichester 12m asl
Brian Gaze
24 September 2020 14:57:00


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
DEW
  • DEW
  • Advanced Member
25 September 2020 06:35:07

Jetstream still in big loop circling the UK which breaks off as a cut-off low over Italy Sun 28th with W-ly flow resuming over UK, weak at first, becoming stronger and forming another loop just W of UK Thu 1st with UK benefiting from S-ly flow. That loop spawns another cut-off Mon 5th centred SW of UK before the whole jet breaks up and is virtually absent from E Atlantic Sat 10th.


GFS - current LP reluctant to move away and still over W Germany Sun 27th (ask the residents of E Anglia about it!) then W-lies for a few days until multi-centre LP establishes over UK Thu/Fri 1/2nd (N-lies in W, S-lies in E) which breaks in two, half moving off N-wards and half S-wards. The latter sits in Biscay for a few days with strong E-ly/SE-ly winds esp Wed 7th but eventually moves back to UK as slack LP Sat 10th


GEFS - Current cold spell at lowest tomorrow, back to normal Sun 28th and not far from norm through to Sat 10th though suggestions of warmth from op & control ca Sat 3rd and coolth more generally Fri 9th. Rain just in E for now and after UK-wide brief dry spell, frequent and general occurrence of rain from Wed 30th, peaks most marked in S.


ECM - 0z agrees with GFS to Thu 1st but (12z) the southern half of the LP does not move off to Biscay but sits over UK and intensifies Sun 4th LATER - 0Z - LP over W Ireland, not UK, but nowhere near Biscay


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

Chichester 12m asl
idj20
25 September 2020 09:13:05


 


 


I'll eat my hat if that actually happens!


Originally Posted by: briggsy6 



Hope you have enough salt and pepper to make that hat taste better.  I wouldn't be surprised if many places in the east of England get to record single digits figures today, even I'm struggling at 9.7 c at 10.15 am this morning here at Folkestone. 



If only it is late January . . . probably still result in marginal slop anyway.

Folkestone Harbour. 
Rob K
25 September 2020 12:34:03
A few runs bringing a waft of mid-teens 850mb air our way around the beginning of October. Won't last long but maybe another bite at a last warm spell?
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
Saint Snow
25 September 2020 14:31:17

A few runs bringing a waft of mid-teens 850mb air our way around the beginning of October. Won't last long but maybe another bite at a last warm spell?

Originally Posted by: Rob K 


 


Too late to save what should have been a superb CET guess by me this month 




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
Sevendust
26 September 2020 10:48:53

Very unsettled and potentially very wet in mid-term this morning

Gooner
26 September 2020 14:21:34


Very unsettled Dave 


 



144 and 168 hrs 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


DEW
  • DEW
  • Advanced Member
26 September 2020 19:13:24

Sorry, no summary today. Nothing serious, just a pile-up of domestic commitments


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

Chichester 12m asl
DEW
  • DEW
  • Advanced Member
27 September 2020 09:02:05

Back lon track this morning ...


Jetsteream - Very loopy forecast. Big cut-off moving down to Italy over the next few days but over N Atlantic rather uncertain until Thu 1st when another big loop forms over UK turning into full cut-off by Sun 4th .  Jet splits, southern part boosts the cut-off lw, northern part moves to Iceland. cut-off breaks  up and the jet runs from NW to SE on track W of Ireland, Wed 7th, switching to N-ly over Uk Sat 10th creating a loop over Europe then before yet another loop forms over UK Tue 13th.


GFS - still gales over SE for a day or so, then brief westerly until trough settles over UK Thu 1st deepening to LP 985mb Wales Sun 4th. Something vaguely W-ly for the following week as that LP fills, new LP 1000mb over England Tue 13th 


GEFS - temps at or a little below seasonal norm (Scotland & N England similar but more irregular) throughout, suggestion of a colder period ca Fri 9th onwards, rain frequent after 2 or 3 dry days, most intense ca Thu 1st - Sun 4th


ECM - places the LP next weekend as deeper and in the Channel 965mb and staying around filling more slowly to Wed 7th


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

Chichester 12m asl
briggsy6
27 September 2020 09:05:58


Sorry, no summary today. Nothing serious, just a pile-up of domestic commitments


Originally Posted by: DEW 


You need to invest in one of those new fangled robotic hoovers.


Location: Uxbridge
CField
27 September 2020 09:37:18

Cloudy damp and raw lovely


Favourite snowstorm
Famous channel low
Dec 31st 1978
Hastings East Sussex
Foot of level snow severe drifting
Next day max temp -4 degrees Celsius
Gooner
27 September 2020 12:09:37




Going through the next week , unsettled /cool and wet 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


Sevendust
27 September 2020 13:59:55





Going through the next week , unsettled /cool and wet 


Originally Posted by: Gooner 

Aye although nights won't be that cool under all that crap! Bring back some HP LOL

Gooner
27 September 2020 17:28:40

Latest update from Gav in the Media thread suggest HP in October bringing fog and frost - be nice to see 


Remember anything after T120 is really Just For Fun



Marcus
Banbury
North Oxfordshire
378 feet A S L


tierradelfuego
27 September 2020 19:35:04


Latest update from Gav in the Media thread suggest HP in October bringing fog and frost - be nice to see 


Originally Posted by: Gooner 


 


Fingers crossed on that front, it would be nice to see. Nothing really on the ECM or GFS supports it, and even the new GEFS, whilst showing a rise in pressure still have a mixed feeling about them unfortunately.


Bucklebury
West Berkshire Downs AONB
135m ASL

VP2 with daytime FARS
Rainfall collector separated at ground level
Anemometer separated above roof level
WeatherLink Live (Byles Green Weather)
UncleAlbert
27 September 2020 20:51:12


 


 


Fingers crossed on that front, it would be nice to see. Nothing really on the ECM or GFS supports it, and even the new GEFS, whilst showing a rise in pressure still have a mixed feeling about them unfortunately.


Originally Posted by: tierradelfuego 


 


Meto long range is on board at least for mid October.


 


(First post for a while - hope all you guys are keeping safe and well!)

UncleAlbert
27 September 2020 21:01:52
Did not realise.... Gav's posts were showing Meto forecast anyway. doooooh.....
Brian Gaze
27 September 2020 21:21:33

There still seems to be a problem with getting the GEFS 840 data sets off WCOSS and on to the file servers. A small set of runs is appearing at the correct time but even now (22:15) there are still 10 perturbations not available for today's update. Until ALL of the 00z perturbations are appearing I'm holding off bringing the new charts / tables. Hopefully there'll be some news in the next few days.


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
DEW
  • DEW
  • Advanced Member
28 September 2020 05:27:43

16-dayer showing all W Europe colder than average while E Europe (at least for week 1) is warm. Especially cool over the Alps - skiing holiday in October, anyone? Plenty of rain over UK, too, especially week 1.


GFS - Pressure gradually dropping this week culminating in LP centred over Wales 985mb Sun 3rd withsome cold air entrained. At same time large HP centred just E of Finland 1040mb. LP hangs around an slowly moves off NE-wards filling by wed 7th while the HP weakens and moves S. Brief ridge of HP Sat 10th but deep LP N of Scotland moves S filling but still covering England Tue 13th.


GEFS - temps up and down the next few days but no better than seasonal norm in S, but occasionally better in Scotland; from Sat 3rd consistently a little below norm becoming cooler still from Thu 8th (the op run doesn't know whether it wants to be a warm or cold outlier!). perhaps some 5C below norm in the S by Mon 12th. A lot of rain Fri 1st - Mon 5th and not particularly dry thereafter.


ECM - will add 0z later but yesterday's 12z confirms next weekend's LP over the UK, arriving a day earlier than GFS, also moving away a day earlier and N/NW-wards unlike GFS ADDED It may arrive earler as a weak feature but really blows up at storm (980mb Scottish borders) Mon 5thand then hamgs around as it fills


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

Chichester 12m asl
CField
28 September 2020 07:06:32

Liking the look of the weather patterns next few days...models then consistantly forecasting lows over UK to then migrate NNE to that horrid place west of Narvik which has happened a lot in recent years.Really reduces chances of sustained cold and doesnt do places like  Western Russia any favours either....makes it impossible for an artic high to impact the weather or a decent link up Siberian Greenland high....need those lows to behave like in 1979 1985..


Favourite snowstorm
Famous channel low
Dec 31st 1978
Hastings East Sussex
Foot of level snow severe drifting
Next day max temp -4 degrees Celsius

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