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tierradelfuego
27 August 2024 17:30:41

Heads-up - the Met Office automated forecasts now come with a "maximum possible" value and a "minimum possible" value too. I guess this is from whatever ensembles they're using behind the scenes, and it's good to see. Hopefully they'll keep it!

Originally Posted by: Retron 



Certainly a useful addition I think, thanks for the heads up. Would be good if they could do the same with rainfall amounts. It might be a tougher ask, especially when convective, however when I look at the Aussie BOM as I do often for family reasons, they manage it pretty well in general.
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picturesareme
27 August 2024 20:21:20

Still no full HP at all over UK so no proper settle ones this year and all NW posters living in south coasts including Londoners posted grim stats and report of lot of dull days and well below average sunshine hours.  What you got is unnoticed to all population who not seen weeks of genuine sunny weather wall to wall ones.  Doesn’t count sunny if there clouds pop up anytime.   Horrible cloudy heat spike to 26 tomorrow here to 29C over London.  I am more looking forward to genuine much warmer sunny full nationwide HP in September.  Highest genuine temps under near full sun as possible was only 25C might break next month. 

Originally Posted by: Jiries 


Well I live on the south coast and i can say for sure plenty of cloudless days this summer, but even more with just a couple of fair weather clouds o on the horizon. 

Not really bothered about high pressure over the center of the UK, as high centered to the south or east will do just fine for us down here. 

24.5C today by the way here and that was with some patchy fair weather clouds about. 
GezM
  • GezM
  • Advanced Member
27 August 2024 20:56:36

Certainly a useful addition I think, thanks for the heads up. Would be good if they could do the same with rainfall amounts. It might be a tougher ask, especially when convective, however when I look at the Aussie BOM as I do often for family reasons, they manage it pretty well in general.

Originally Posted by: tierradelfuego 


I'm a big fan of the Aussie BOM. I use it mainly because I love keeping an eye on weather around the world but also because I have a brother in New South Wales. So many good features on their website. 
But this Met Office addition is interesting too. I notice that the further you go into the future, the bigger the possible deviations are  - as you'd expect. For example, St Albans next Monday is forecast to have a high of 26C and a low of 15C but possible ranges are between 32C and 10C.
Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
DEW
  • DEW
  • Advanced Member
28 August 2024 07:20:17
WX temps have backed down from the spectacular cooling shown yesterday, but not completely. Week 1 has a zonal distribution of temp, still quite hot for S France and across to Poland, cooler for N Scotland and Norway, Britain in between. Week 2, slight cooling for France, more definitely for Scotland and the whole of Scandinavia, SE England still just about warm. Rain in week 1 patchy for continental W Europe, drier for Britain, also especially Russia; in week 2 concentrated over France and S England, very dry for Scotland east to the Baltic and Russia.

GFS Op - pressure rising over the next few days to become centred over NE Britain Sat 31st 1025mb. For the following week pressure remains high over Scotland in the shape of a bridge between the Atlantic and Scandinavia, while shallow areas of LP affect S England (1015mb Holland Wed 4th, 1010mb Channel Mon 9th). From the 9th, the HP re-arranges into a broad ridge from Iceland to Scotland with any LP retreating further S into France.

ECM - something like GFS, but a deep trough between the Atlantic and Scandinavian centres Sun 1st, though too far west to affect all but extreme W Britain. LP then affects S Britain from the Channel only on Thu 5th, and the development of a ridge of HP to Iceland starts as early as Sat 7th.

GEM - the HP bridge referred to above doesn't establish straight away, with all of Britain under a trough lying N-S on Wed 4th. Later, once HP on the Atlantic and Scandinavia link up, LP moves further N to cover all of England Fri 6th

GEFS - temps back to norm Sat 31st then warm again Mon 2nd with good ens agreement. After Thu 5th the mean stays near norm to the end of run (chance of something warmer in the far N Mon 9th), but very little agreement between ens members (on the 7th, a 20C spread between hottest and coldest in the S). Rain most likely for a week beginning Mon 2nd but only a few ens members show large amounts and those mostly in the S.
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Chichester 12m asl
Jiries
28 August 2024 08:47:40
Lot of HP around in first half of September with decent warm temperatures and many sunny days to sunny periods.  Possible warm/hot spell on the 7th but not dull heat spike thankfully.  Longest HP from Azores to Russia and well covered UK with Iberian low giving us some warmth on 7th with mid to high 20's.  
The Beast from the East
28 August 2024 09:53:54
ECM op certainly showing what could happen with a bit of luck (or bad luck if you dont like heat!)
30C in September is now completely unremarkable though. 
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ozone_aurora
28 August 2024 10:16:29
I felt that September would be a very summer like month, ever since the unsettled conditions set in by early June. It seemed very easy to forecast!

There must by some event around the world that triggers a game changer in the UK's weather around the closing days of August.
Retron
28 August 2024 10:33:46


There must by some event around the world that triggers a game changer in the UK's weather around the closing days of August.

Originally Posted by: ozone_aurora 


The game-changer, whatever it was, happened in mid-July FWIW.


Leysdown, north Kent
GezM
  • GezM
  • Advanced Member
28 August 2024 11:25:53
There seems to be a lot of confidence for a warm, sunny September. It certainly looks reasonable but there are many cool options on the table and if anything it is looking more unsettled over parts of the the UK than it did a couple of days ago. I certainly don't see anything exceptional like we had last year. 
Living in St Albans, Herts (116m asl)
Working at Luton Airport, Beds (160m asl)
28 August 2024 16:21:46
The GFS 12z op is pretty terrible after Saturday.  An evil little depression interacting with the jet which bull dozes into the high pressure, then sits slack over the UK until gone midweek .
Brian Gaze
28 August 2024 16:44:42
I reckon you've got to move the thick black line up by about 2C to 4C (at least in the south east) to see as many runs below it as above it through the course of a typical year these days.

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Brian Gaze
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Brian Gaze
28 August 2024 17:09:00
Arpege firing up the blowtorch this weekend. 30C in the south to start September? 

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Brian Gaze
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Retron
28 August 2024 17:14:08

Arpege firing up the blowtorch this weekend. 30C in the south to start September? 

Originally Posted by: Brian Gaze 


It's gone off on one, but the way things are these days you wouldn't bet against it! At least we'll avoid the party here, as by the weekend there'll be a stiff ENE'ly blowing. SSTs have fallen from their high earlier in August (briefly 22C) too, they're now 19C in the Thames Estuary.


Leysdown, north Kent
Jiries
28 August 2024 17:17:59

Arpege firing up the blowtorch this weekend. 30C in the south to start September? 

UserPostedImage

Originally Posted by: Brian Gaze 


September that normally allow us access to those temps that we been stolen away this summer with failures and failed forecasts will happen this time round to allow access to those temps? Today was supposed to be 26C only 21-23C due to nasty clouds.
doctormog
28 August 2024 17:18:22
14°C for the very beginning of September looks chilly. I suspect it’s as accurate as ever for this coastal location.
Ally Pally Snowman
28 August 2024 17:24:22

The GFS 12z op is pretty terrible after Saturday.  An evil little depression interacting with the jet which bull dozes into the high pressure, then sits slack over the UK until gone midweek .

Originally Posted by: HighPressureGloom 


GFS has been all over the place recently.  It has no idea what's happening next week. 

Bishop's Stortford 85m ASL.
Jiries
28 August 2024 17:26:01

It's gone off on one, but the way things are these days you wouldn't bet against it! At least we'll avoid the party here, as by the weekend there'll be a stiff ENE'ly blowing. SSTs have fallen from their high earlier in August (briefly 22C) too, they're now 19C in the Thames Estuary.

Originally Posted by: Retron 


Do you keep record of those sea temps? I used to see low as 4C to 20C in summer on the Wetterzentrale sea temps format.  I used to view them daily when i was viewig models as the Thamas Estuary are the nearest water area to Epsom which is way inland from it but nearest point.
Retron
28 August 2024 17:28:01

September that normally allow us access to those temps that we been stolen away this summer with failures and failed forecasts will happen this time round to allow access to those temps? Today was supposed to be 26C only 21-23C due to nasty clouds.

Originally Posted by: Jiries 


Still 26C down here and it's half six! The modelling couldn't have been better, the MetO raw had a max of 29 and the max was... exactly 29.0.

(I still suspect my weather station is feeding into the modelling too, as mine is the only one on WOW locally and as per the info I linked the other day, the Met Office are now using WOW data to improve their forecasts...)
Leysdown, north Kent
sunny coast
28 August 2024 17:29:22

Well I live on the south coast and i can say for sure plenty of cloudless days this summer, but even more with just a couple of fair weather clouds o on the horizon. 

Not really bothered about high pressure over the center of the UK, as high centered to the south or east will do just fine for us down here. 

24.5C today by the way here and that was with some patchy fair weather clouds about. 

Originally Posted by: picturesareme 


Same for us in eastbourne some lovely Summer weather in recent weeks and todqy sunny and 25 degrees .
Retron
28 August 2024 17:31:03

Do you keep record of those sea temps? I used to see low as 4C to 20C in summer on the Wetterzentrale sea temps format.  I used to view them daily when i was viewig models as the Thamas Estuary are the nearest water area to Epsom which is way inland from it but nearest point.

Originally Posted by: Jiries 


I don't any more - I used to run a script every day which archived them, but stopped that years ago as archives became available online.

Meteociel has daily archives going back to 2006 here:

https://www.meteociel.fr/accueil/sst.php 

22C is on the high end of what you'd expect to show on the charts, though! Bear in mind the North Sea as a whole is very shallow as seas go (around 300ft), and the Thames Estuary is shallower still, hence it warms up and cools down very quickly.


Leysdown, north Kent
Jiries
28 August 2024 17:48:23

I don't any more - I used to run a script every day which archived them, but stopped that years ago as archives became available online.

Meteociel has daily archives going back to 2006 here:

https://www.meteociel.fr/accueil/sst.php 

22C is on the high end of what you'd expect to show on the charts, though! Bear in mind the North Sea as a whole is very shallow as seas go (around 300ft), and the Thames Estuary is shallower still, hence it warms up and cools down very quickly.

Originally Posted by: Retron 


Cheers and book marked it as it more clearer than WZ format.  I can also see Cyprus on Europe Map and seem a cooler pool over south side while hotter to the north and east.  Wondering where this cool pool enter the sea from inland hot Cyprus not like this on WZ format.
icecoldstevet
28 August 2024 19:47:22
Apart from a couple of days when we had 24c most of the summer we've been at or around 20c and the models and apps look like that will be the case all the way out to 10th September, that's just right, nobody 'needs' 25c or above all people want to do when you get that is find someway or somewhere to get cool.
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Ally Pally Snowman
29 August 2024 06:32:10
Ecm is terrible this morning.  Autumn starts in 4 days if it's right. Quite the turnaround.  UKmo and GEM are better. But GFS although not as bad is similar.  Shame to miss more settled  warmth.  Big let down.
Bishop's Stortford 85m ASL.
Ally Pally Snowman
29 August 2024 06:36:25
Ecm has to be a worst case scenario.  Hopefully 🙏
Bishop's Stortford 85m ASL.
Ally Pally Snowman
29 August 2024 06:51:35
Ecm eventually brings the heat at day 9. But it's not trustworthy at that range . It's been terrible this summer in the 168/240 range
Bishop's Stortford 85m ASL.

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