The Weather Outlook

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Rob K
23 June 2026 17:18:02

The 06z EMS paints a nice cooler, fresher picture for next week.

Better for running in.🏃‍♂️

Originally Posted by: Charmhills 

BBC weather only has one day that doesn't reach 25C here in the entire 14 day forecast!


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

doctormog
23 June 2026 17:28:05

BBC weather only has one day that doesn't reach 25C here in the entire 14 day forecast!

Originally Posted by: Rob K 

The BBC weather app and website automated forecasts are shockingly bad for here. It’s supposed to have been drizzly and about 21°C here just now based on this morning’s “forecast”. The reality is 28°C and sunny. The temperature reaches 20°C on one day in the entire current forecast, the models say several days and maybe up to 23°C. I think that even the “postcode” forecast has us half in the sea.


Tom Oxon
23 June 2026 23:02:09
Closing out the night with the high res runs

Arome 12z - 37C wed in the london area - possible urban heat island distortion given the surrounding home counties are in the region of 32-25C.

Arpege 18z - Wed has 35/36 in north Hampshire/Berkshire territory, Thu pushes 36/37/38 into North Hants/Wilts/Somerset/North Dorset.

UKV 15z - Almost identical to Arpege 18z across Wed & Thu, the West Midland 39/40C furnace has disappeared.

I think I'm going to punt for 38.xC in Hampshire as our new June record.


S Warwickshire countryside, c.375ft asl.
saxtemp
23 June 2026 23:39:30
East Anglia for Friday could even be the peak, UKV has it at 39c
DEW
  • DEW
  • Advanced Member
24 June 2026 07:24:50
FAX - current HP moving to Denmark 1020mb by Fri 26th bringing in (even warmer?) SE-lies but making way for LP moving north from Spain 1008mb off Brittany at that time (the chart shows a front and a trough for S England; I'm surprised there's no mention of storms in the MetO forecast with this set-up). This LP trundles on northwards and combines with Atlantic LP 988mb south of Iceland with fresher westerlies Sun 28th, strong in the north, weaker and still close to HP in the south.

GFS Op 0z - follows on from FAX and initiates a period from Sun 28th through to Thu 9th with HP lurking to the SW, sometimes closer with ridge to Britain (Tue 30th, Mon 6th), sometimes withdrawing and allowing cooler NW-lies to predominate (Fri 3rd, Wed 8th). On Fri 10th the Atlantic asserts itself and projects LP to the Western Isles 995mb, cool with LP for all.

ECM (to T+240) - similar to GFS but with the centre of HP further west after 28th with a steadier westerly as a result.

AIFS - London, staying at 33-35C to Fri 26th, then sliding  downwards quickly, eventually to 20C on Tue 30th, followed by a slow rise to 25C Wed 8th. Rain at intervals from Sun 28th - Thu 2nd. Edinburgh, peak 23C Thu 25th, dipping on Fri with rain, then a brief recovery before decreasing to 17C Tue 30th with more rain, followed by a rise to 20C Tue 7th but small amounts of rain from time to time. 

GEFS - In the S, temps (both mean and ens agreement) from 13C above norm Fri 26th to norm Mon 29th and staying there. A few sharp peaks of (showery?) rain to 29th then dry in nearly all runs in the far S, some chances of rain further north in England. In Scotland, similar dramatic drop in temp (though the peak heat is only for one day, the 26th) ,  and although mean stays near norm, even a bit below, after the weekend there is less ens agreement; more definite rain on 26th and higher chances of rain later esp in west.


It's not the voting that's democracy, it's the counting - Tom Stoppard

Chichester 12m asl

Charmhills
24 June 2026 07:27:36
https://www.wetterzentrale.de/en/ens_image.php?geoid=50902&var=201&run=0&date=2026-06-24&model=gfs&member=ENS&bw=1 

Cooler, fresher conditions after the heat with temps close to average.

A few showers around but a fairly dry picture continues.


Loughborough, EM.

Knowledge is power, ignorance is weakness.

Duane.

Tom Oxon
24 June 2026 08:33:04
Arome & Aroege morning runs aligned in the heat peaking at 38 across Central Southern England across today and tomorrow.  There is an emerging Suffolk dark horse on Friday, but we'll have to see h9w much of a breeze picks up.

Interestingly UKV has reintroduced 39/40C in the Dorset/Wilts/Wants area for tomorrow, but is out on its own there and not being backed up by professional forecasts.


S Warwickshire countryside, c.375ft asl.
Saint Snow
24 June 2026 09:53:32
So... when's the next heatwave coming?

😄


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

johncs2016
24 June 2026 10:05:27

So... when's the next heatwave coming?

😄

Originally Posted by: Saint Snow 

With the way that this is all going just now, that next heatwave will probably end up happening sometime in July regardless of what the models are actually saying about that.

Just a week or so ago, I didn't think that we would get anything else this year which would come even close to matching what happened in May, let alone actually beat that. However, that prediction was probably based on the old climate whereas climate change has now completely changed the goalposts for that and greatly increased the chances of such an event happening.

Because of that, I wouldn't be the least bit surprised if that event when it no doubt happens in the second half of July, ends up beating this one with the temperature exceeding 40°C somewhere in the UK and beating the record from 2022.

Given all of the other impacts which that event in 2022 had on what was happening in the UK in general, that is a very scary thought.


The north of Edinburgh, usually always missing out on snow events which occur not just within the rest of Scotland or the UK, but also within the rest of Edinburgh.

Rob K
24 June 2026 11:22:02

So... when's the next heatwave coming?

😄

Originally Posted by: Saint Snow 

And when will this one end? Latest GFS doesn't have a proper cooldown (below 26C) until next Thursday now...


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
24 June 2026 11:42:19

And when will this one end? Latest GFS doesn't have a proper cooldown (below 26C) until next Thursday now...

Originally Posted by: Rob K 

Perhaps for you...

For here (not even halfway up the UK), Sunday temps will be around 20-22c, and bobbling around 20-21c through the following week.


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

Ally Pally Snowman
24 June 2026 11:47:14
Most output atm seems to suggest HP will try and build in over the UK but struggle to takeover completely.  So settled for most but no heatwave imminent after this one.
Bishop's Stortford 85m ASL.
Saint Snow
24 June 2026 13:06:13

Most output atm seems to suggest HP will try and build in over the UK but struggle to takeover completely.  So settled for most but no heatwave imminent after this one.

Originally Posted by: Ally Pally Snowman 

I may be misremembering, but have a feeling this current one started off the same way. Then the higher temps would probably only impact the SE and be get to 30c. Then some output showed a wider region affected. And so on.

Every great oak, etc, etc*

.

.

* this adage doesn't apply to winter, where the saplings of 'great Arctic blasts' get munched by the grazing herbivores of Atlantic filth


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

Tom Oxon
24 June 2026 16:28:50
The 12z Arpege is out and has been performing really well in at high res in the near term, and has been bang on with a provisional 36.1C registered in Hampshire.

I think we're on for a new high tomorrow, quite a few pockets of 37C

UserPostedImage

Hampshire/Wilts/Somerset/Sussex/Gloucs all have contenders.  I'd probably stick with Hants or Wilts taking the crown, 37.xC, probably high, possibly squeaking a low 38C.

The Suffolk furnance for Friday has been downgraded, tomorrow is looking like the absolute peak.


S Warwickshire countryside, c.375ft asl.
Rob K
24 June 2026 16:42:22
Yes I think we'll see a 37 tomorrow quite easily. Maybe on Friday too. GFS has 35 on Saturday too but Arpege tops out at 33.

Talking of GFS, the 12Z run seems to keep things fairly settled in the south next week with temperatures starting to climb again by next weekend.

Amazing to think we still have over two months of summer left!


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
24 June 2026 17:22:04

I may be misremembering, but have a feeling this current one started off the same way. Then the higher temps would probably only impact the SE and be get to 30c. Then some output showed a wider region affected. And so on.

Every great oak, etc, etc*

.

.

* this adage doesn't apply to winter, where the saplings of 'great Arctic blasts' get munched by the grazing herbivores of Atlantic filth

Originally Posted by: Saint Snow 

Well right on cue GFS 12z produces its hottest run for a while.


Bishop's Stortford 85m ASL.
Heavy Weather 2013
24 June 2026 17:35:33

Well right on cue GFS 12z produces its hottest run for a while.

Originally Posted by: Ally Pally Snowman 

I literally came here to say same, next week looks already better with HP hanging on ok in the south and then it looks like another heatwave developing, long way off but the background signal in terms of upstream pattern are favouring a repeating pattern.


Mark

Beckton, E London

Less than 500m from the end of London City Airport runway.

24 June 2026 22:55:11

The 12z Arpege is out and has been performing really well in at high res in the near term, and has been bang on with a provisional 36.1C registered in Hampshire.

I think we're on for a new high tomorrow, quite a few pockets of 37C

UserPostedImage

Hampshire/Wilts/Somerset/Sussex/Gloucs all have contenders.  I'd probably stick with Hants or Wilts taking the crown, 37.xC, probably high, possibly squeaking a low 38C.

The Suffolk furnance for Friday has been downgraded, tomorrow is looking like the absolute peak.

Originally Posted by: Tom Oxon 

I like this gives my 33/1 bet for the Scottish heat record a little boost imo 33c on the models can easily be corrected >2c in reality around these parts!

Tom Oxon
24 June 2026 22:56:34
Some last minute downgrades from the Arpege 18z on tomorrow, making 38 less likely and 37C by no means a cert.   Also wider downgrades for the east on Friday.

Some fairly lively atmospherics over northern Wales on Friday morning. pushing into Merseyside/Lancs/Cumbria/W Yorks later on.

https://www.theweatheroutlook.com/charts/arpege/18_43_ukcape.png 


S Warwickshire countryside, c.375ft asl.
24 June 2026 23:01:43

Some last minute downgrades from the Arpege 18z on tomorrow, making 38 less likely and 37C by no means a cert.   Also wider downgrades for the east on Friday.

Some fairly lively atmospherics over northern Wales on Friday morning. pushing into Merseyside/Lancs/Cumbria/W Yorks later on.

https://www.theweatheroutlook.com/charts/arpege/18_43_ukcape.png 

Originally Posted by: Tom Oxon 

Excellent them cape values are ridiculous especially for the north! 

Just a quick edit because this British understatement of ours is not doing this justice 😂

"Fairly lively"

Cape values of 3000 J/kg is pure, unadulterated American Tornado Alley weather!

24 June 2026 23:39:02

I think the trend in the GFS 12z data is pretty clear: 

https://www.wetterzentrale.de/en/ens_image.php?geoid=51243&var=201&run=12&date=2026-06-24&model=gfs&member=ENS&bw=1 

UserPostedImage

Originally Posted by: doctormog 

Dude your weather as a much relevance to the fellas in the South East of England as the polar bears weather on Svalbard does🤣🤣

DEW
  • DEW
  • Advanced Member
25 June 2026 06:33:18
FAX - LP 1010 Biscay taking over, fronts for Scotland, (thundery) troughs for S England. This LP combines with LP from the Atlantic to become 986mb south of Iceland Sun 28th pushing Atlantic fronts and presumably cooler conditions across the country before setting down to a standard westerly pattern, unsettled in the N & W, higher pressure keeping it fine in the SE.

GFS Op 0z - for w/b Sun 28th, HP tries a come-back with a ridge across N England and again warmth for the south on easterlies. This doesn't last as the HP withdraws to the Atlantic and winds go back to W-ly, then NW-ly. For w/b Sun 5th series of LPs become the controlling feature with the source of air  being the north Atlantic - .LP centres Sun 5th 990mb Faeroes, then Tue 7th 1000mb N England then Sat 11th 1005mb Cornwall 

ECM - agrees with GFS

AIFS - London, peak maximum 33C Fri 26th followed by a drop to low 20s C with a little rain Sun 28th - Fri 3rd. Then drier and progressively warmer to 30C by Fri 10th (doesn't match GFS Op). Edinburgh, a couple of peaks Thu & Sat, otherwise maxima in upper teens through to Tue 7th before rapidly rising to 25C . Quite a lot of rain in the coming week, then dry.  Winds in both cases mostly from a westerly point (London E-ly at first and S-ly at the end)

GEFS - Temps dropping from 14C above norm now(less in Scotland) to norm by Sun 28th and staying there, good agreement of mean and ens members (a few hot outliers after 5th Jul) Rain this weekend then mainly dry, perhaps some more in NW England later but more persistent in NW Scotland.

GEFS - 


It's not the voting that's democracy, it's the counting - Tom Stoppard

Chichester 12m asl

Heavy Weather 2013
25 June 2026 06:42:01
Looking at the GFS ensembles. There are a lot more runs in FI now looking quite spikey suggesting the models are toying with another heatwave - this is supported by upstream patterns. The op was an outlier, but it should be noted that next week is already looking a lot better in the south at least with more HP and very warm temps. Crazy to think 25C seems almost cold compared to recent events.
Mark

Beckton, E London

Less than 500m from the end of London City Airport runway.

doctormog
25 June 2026 06:59:37

Dude your weather as a much relevance to the fellas in the South East of England as the polar bears weather on Svalbard does🤣🤣

Originally Posted by: HighPressureGloom 

Oops sorry I didn’t realise this was the Southeast thread.

If you were less parochial and lazy you would see the pattern in the t850 ensemble charts is reflected across the country, not that the weather in only your little corner of the world is of much interest to me, I prefer to look at the bigger picture…dude.

In fact it is even more marked in the SE: https://www.wetterzentrale.de/en/ens_image.php?geoid=49069&var=201&run=0&date=2026-06-25&model=gfs&member=ENS&bw=1 


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