The Weather Outlook

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Hungry Tiger
01 August 2026 12:50:34
Heatwave No 5 is to all intents and purposes on. 30C to 32C early this coming week.  Another longer spell apparently on from 9/10th onwards. 

🙂🙂🙂🙂


Gavin S. FRmetS.

TWO Moderator.

Contact the TWO team - [email protected]

South Cambridgeshire. 93 metres or 302.25 feet ASL.



Hungry Tiger
01 August 2026 12:54:23
As promised I've moved heatwave No 4 thread to the classics section, if anyone wants to refer to it. 

BTW, I have to say there's some really excellent contributions from those on here on these topics. Thanks and well done everyone.  🙂🙂🙂🙂


Gavin S. FRmetS.

TWO Moderator.

Contact the TWO team - [email protected]

South Cambridgeshire. 93 metres or 302.25 feet ASL.



Hungry Tiger
01 August 2026 13:22:53
Source with acknowledgements.  

GFS 06z is buliding a large high pressure system from the West next weekend into the following week.

Note, other models like the ECM has high pressure buliding abit earlier than this.

GFS is still not having any meanful rainfall for the south next week. It is a  Low Resolution so maybe the model won't pick up on showers however. Tuesday looks the best chance.

This option is gathering more and more support. Fits in with expectations for mid month to be very warm to hot. I'd say 9th-10th onwards.


Gavin S. FRmetS.

TWO Moderator.

Contact the TWO team - [email protected]

South Cambridgeshire. 93 metres or 302.25 feet ASL.



picturesareme
01 August 2026 18:13:21
What are our odds of seeing some ⚡💥⚡💥 from this upcoming mini Spanish plume? 
Jiries
01 August 2026 21:54:26

Source with acknowledgements.  

GFS 06z is buliding a large high pressure system from the West next weekend into the following week.

Note, other models like the ECM has high pressure buliding abit earlier than this.

GFS is still not having any meanful rainfall for the south next week. It is a  Low Resolution so maybe the model won't pick up on showers however. Tuesday looks the best chance.

This option is gathering more and more support. Fits in with expectations for mid month to be very warm to hot. I'd say 9th-10th onwards.

Originally Posted by: Hungry Tiger 

The useless app are so terrible wrong for this coming week as vast difference from all the models and from posts that are so informative, all I see is no sun, rain all day and extremely low day maxes.  All I know will be hot dry and sunny in low 30s here on Monday then mid 20s with sunshine and staying dry as we been told HP strongly build again.  Today was 26.5C while app undercooked at 23.  Been using fan every night and day from late morning to 5 or 6 to turn off.  I would not use fan if the temps was 23 as the twat app think.

Ally Pally Snowman
02 August 2026 07:04:29
Arpege 0z, 

29c, 33c ,32c, 27c.

Not spectacular like we've been used too, but decent enough. 

It's also been under doing the temps by a degree or two recently. 


Bishop's Stortford 85m ASL.
Ally Pally Snowman
02 August 2026 07:07:45
GFS 0z very similar to Arpege 

29c, 34c, 32c, 28c


Bishop's Stortford 85m ASL.
Charmhills
02 August 2026 08:25:14

What are our odds of seeing some ⚡💥⚡💥 from this upcoming mini Spanish plume? 

Originally Posted by: picturesareme 

Very little away from the West.


Loughborough, EM.

Knowledge is power, ignorance is weakness.

Duane.

The Beast from the East
02 August 2026 09:18:25

What are our odds of seeing some ⚡💥⚡💥 from this upcoming mini Spanish plume? 

Originally Posted by: picturesareme 

Our only chance of rain down here on Monday/Tuesday.  After that it looks dry for some time again,


Purley, Surrey, 70m ASL

"We have some alternative facts for you"

Kelly-Ann Conway - former special adviser to the President

saxtemp
02 August 2026 11:20:41
OT because it refers to HW4, but despite knowing Friday was only forecast to be 26c, it really felt like a 30c. I was expecting to come back to find the models had well undercooked it, but was suprised how low the actual temperatures were.

I saw GFS has 35 as soon as tomorrow, That would make 5 heatwaves where 35c has been reached, over 4 consecutive months.

Prior to this the previous record was 2 heatwaves of 35c, and prior to Covid, never more than 1.

UserPostedImage

Ally Pally Snowman
02 August 2026 11:43:32
Herstmonceaux 27.8c already 

Good chance of 30c today you'd think , if the cloud keeps away.


Bishop's Stortford 85m ASL.
saxtemp
02 August 2026 13:08:36

Herstmonceaux 27.8c already 

Good chance of 30c today you'd think , if the cloud keeps away.

Originally Posted by: Ally Pally Snowman 

Charlwood 29.5c. I'd wager on it.

TimS
  • TimS
  • Advanced Member
02 August 2026 13:24:15

Charlwood 29.5c. I'd wager on it.

Originally Posted by: saxtemp 

Charlwood is yet again way ahead of elsewhere. I think there’s a problem there.

That said, a warm day down in the far South today. Lots of 28s.


Brockley, South East London 30m asl
Ally Pally Snowman
02 August 2026 13:44:55

Charlwood 29.5c. I'd wager on it.

Originally Posted by: saxtemp 

It's got to 30.3c so another 30c day the 33rd?

But is it too high?? Feels like it could be.

Met Office haven't said yet but wouldn't surprise me if they do discount later. 


Bishop's Stortford 85m ASL.
Rob K
02 August 2026 13:59:30

It's got to 30.3c so another 30c day the 33rd?

But is it too high?? Feels like it could be.

Met Office haven't said yet but wouldn't surprise me if they do discount later. 

Originally Posted by: Ally Pally Snowman 

Yes I think there is a good chance we will see the Charlwood values scrubbed from the record books at the end of this month. 

As for the coming heatwave, hopefully we can manage a 35C tomorrow but after Tuesday I can't see much of a heatwave for many. Mid to high 20s, maybe just about continuing heatwave criteria.


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
02 August 2026 14:09:29

Yes I think there is a good chance we will see the Charlwood values scrubbed from the record books at the end of this month. 

As for the coming heatwave, hopefully we can manage a 35C tomorrow but after Tuesday I can't see much of a heatwave for many. Mid to high 20s, maybe just about continuing heatwave criteria.

Originally Posted by: Rob K 

30.9c now in Charlwood lol

If it is dodgy why don't the Met Office discount it now? They did with Yeovilton the same day it went wrong. Very odd. Maybe it's legit? Who knows?


Bishop's Stortford 85m ASL.
Ally Pally Snowman
02 August 2026 14:11:26
Wisley 29.5c , Maybe Charlwood is legit?
Bishop's Stortford 85m ASL.
Rob K
02 August 2026 15:24:45
29.6 seems to be the highest other station, so once again Charlwood is over a degree hotter than anywhere else. Gatwick hasn't been above a rounded 28 and the two stations are only two miles apart.

If Charlwood is accepted then that is 33 30C+ days which means we should break the record for most 30C days in a year on Tuesday.


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

DEW
  • DEW
  • Advanced Member
02 August 2026 16:37:58

29.6 seems to be the highest other station, so once again Charlwood is over a degree hotter than anywhere else. Gatwick hasn't been above a rounded 28 and the two stations are only two miles apart.

Originally Posted by: Rob K 

Not another suspect 'runway effect'?

With a light easterly wind (as was the case today) the air could pass from Gatwick - I assume the observation station is near the terminal building at the east end of the runway - 3.7km straight down the length of the runways to Charlwood where the station is not in the village but on the Birchfield Estate  just 1km west of the end of the runway.


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

Chichester 12m asl

Ally Pally Snowman
02 August 2026 16:49:21
I've emailed the Met Office about Charlwood,  see what the reply will be. 

The ultra dry weather may be accentuating the conditions locally. We'll see


Bishop's Stortford 85m ASL.
Rob K
02 August 2026 16:50:04

Not another suspect 'runway effect'?

With a light easterly wind (as was the case today) the air could pass from Gatwick - I assume the observation station is near the terminal building at the east end of the runway - 3.7km straight down the length of the runways to Charlwood where the station is not in the village but on the Birchfield Estate  just 1km west of the end of the runway.

Originally Posted by: DEW 

Possibly. The station is pretty much aligned with the centre line of the runway.

Regarding tomorrow's max, the GFS has nudged the temperature down a degree or so - still some 35C gridpoints but the 35C isotherm has almost vanished. I would expect to see the 15Z UKV update drop to 34 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

doctormog
02 August 2026 16:54:55

Possibly. The station is pretty much aligned with the centre line of the runway.

Regarding tomorrow's max, the GFS has nudged the temperature down a degree or so - still some 35C gridpoints but the 35C isotherm has almost vanished. I would expect to see the 15Z UKV update drop to 34 now.

Originally Posted by: Rob K 

I can empathise. It has dropped by a degree or so here on the 12z GFS op run too, so I think the 13°C isotherm has disappeared.


Ally Pally Snowman
02 August 2026 17:39:45

I've emailed the Met Office about Charlwood,  see what the reply will be. 

The ultra dry weather may be accentuating the conditions locally. We'll see

Originally Posted by: Ally Pally Snowman 

Well I've got a reply, 

"Thank you for your email in regarding the anomaly of temperature on that site.

It is currently a known issue and we are investigating it as we speak and possibly removing it as it is likely an error.

I will update you when an action has been made to resolve it."


Bishop's Stortford 85m ASL.
Ally Pally Snowman
02 August 2026 17:41:01
So looks like we are back to 31 30c days.

Bit of a shame, but it didn't look right. 

One thing I would say is that the Met Office are very good at replying to queries. 


Bishop's Stortford 85m ASL.
Jiries
02 August 2026 17:57:17

I've emailed the Met Office about Charlwood,  see what the reply will be. 

The ultra dry weather may be accentuating the conditions locally. We'll see

Originally Posted by: Ally Pally Snowman 

What about in the past when Concorde used to take off at Heathrow or any other airport during it visit, they have massive reheat but seem not effect the station temperatures?

Today was 28.7C.

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