The Weather Outlook

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Matty H
Wednesday, June 18, 2025 2:28:38 PM

Absolutely right . Anyone welcoming 40c heat in this country needs to bear in mind the state of the NHS which would be overwhelmed by a severe heatwave not to mention rail and Tube travel ,and again our dwindling water supplies  will not cope .

 

Originally Posted by: bledur 

No one ever says any of this when it’s disruptive  snow and ice 


Yate, Nr Bristol

TBFTEIARBSC

Rob K
Wednesday, June 18, 2025 3:38:20 PM

Would anybody seriously enjoy 40c in the UK ?

It's fine in countries where everything is designed to cope with temperatures like that, but we are not one of those countries.

30c is hot enough here - 40c would be horrendous

Originally Posted by: Steve 

While we didn't quite get to 40C here on that day in 2022 (local high was about 38C I believe) I didn't find it horrendous at all. It was a very dry heat with a warm breeze and much less oppressive than many "cooler" days we have had.

Regarding the AIFS it doesn't look that bad to me. Yes there is a bit of rain around but it is also very warm. We need some rain anyway - our sandy soil is simply dust, even several inches down.


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

Devonian
Wednesday, June 18, 2025 3:46:04 PM

I will take comfort for the time being in 46.6c being just theoretical! 

Originally Posted by: westv 

The climate will continue to warm while greenhouse gas concentrations increase, and for a while after that (assuming humanity has the wit to get pollution under control - I have my doubt). Further, feedbacks are really kicking in now (think forest fires, warming oceans, melting ice).

It would be foolish not to listen to what those scientists, who predicted what is happening now at least four decades ago, are saying now about future decades.

We are on a dangerous path.

Chidog
Wednesday, June 18, 2025 4:13:24 PM
Gfs 12z shifted the low >500 miles further east by day 5 with a Northerly into Scotland. Proper opposite of recent runs so far.

Edit: but then the high ridges in again

Rob K
Wednesday, June 18, 2025 4:14:48 PM

GFS going for 33C on Saturday on the 12Z. Less LP influence in the south than the 6Z run, keeping 850s a good few degrees higher than on that run.


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

Caz
  • Caz
  • Advanced Member
Wednesday, June 18, 2025 4:25:43 PM

Would anybody seriously enjoy 40c in the UK ?

It's fine in countries where everything is designed to cope with temperatures like that, but we are not one of those countries.

30c is hot enough here - 40c would be horrendous

Originally Posted by: Steve 

We had 40c on 19th July 2022 and it was quite scary, although we got through it unscathed.  Trying to keep our toddler granddaughter cool wasn’t easy but a paddling pool under a gazebo came in handy for us both.  I’m not hoping for anything like that again.  Even 30c is too much for me these days.  Give me low to mid 20’s any day.  


Market Warsop, North Nottinghamshire.

Join the fun and banter of the monthly CET competition.

Retron
Wednesday, June 18, 2025 4:33:03 PM

You might not want to read this new study by the Met Office then Retron:

https://rmets.onlinelibrary.wiley.com/doi/10.1002/wea.7741 

It gives a 50:50 chance of 40c happening within 12 years of the 2022 date and moreover suggests that the theoretical possible UK maximum in today's climate is a staggering 46.6c!!

It makes for grim reading. 

Originally Posted by: scillydave 

Thank you for that link, a fascinating bit of research and confirms what we all knew - things are warming up, and increasingly so, with increased "spikiness", for want of a simple description. It's great news for fans of heat but of course terrible news for our agriculture, amongst other sectors. 

Even in the fantasy world of computer models, we've seen it: just look how often 35C T2Ms or 20C 850s are modelled nowadays, compared to the late 90s (when many of us started looking at the charts). Heck, we've seen more modelled 40s over the UK in the past few days on rogue GEFS runs than we'd seen in the entirety of the Web era, aside of course from 2022. 


Leysdown, north Kent
Ally Pally Snowman
Wednesday, June 18, 2025 4:43:31 PM

The Hull to Exeter line working wonders on the GFS 12z.

https://www.wetterzentrale.de/en/topkarten.php?map=20&model=gfs&var=17&run=12&time=219&lid=OP&h=0&mv=0&tr=3#mapref 


Bishop's Stortford 85m ASL.
johncs2016
Wednesday, June 18, 2025 4:46:23 PM
According to the latest model output, it looks as though we're likely to get nothing more than a brief glancing blew from this upcoming spell of hot weather here in Edinburgh which means that we're unlikely to see an actual technical heatwave here. For that to happen here, our temperature needs to be around 25°C or above for three or more consecutive days.

The latest output from the Met Office has actually upgraded Friday's possible maximum temperature to around 26°C here in Edinburgh, so we still continue to be on course to get our hottest day of the year do far then.

However, the Met Office forecast for Saturday has now been downgraded to only around 24°C which would then result in our heatwave chances already being scuppered even before the cooler air arrives from the west.

Furthermore, there isn't any actual output which is going for us to actually get our hottest June day on record, so that is looking unlikely and it would appear that the cooler air being modelled to come in slightly quicker than what was anticipated with yesterday's output. With Friday's forecast being slightly upgraded though, it still would not take much of an further upgrade on that to then result in Friday being our hottest June day on record.

As we get further into the summer and towards the actual high summer, more heat spikes can never be ruled out but from how it's looking just now, I would still say that we really had our "summer" in April and May as a result of that being when we had our best and longest sustained spell of dry, warm and sunny weather even if that doesn't actually end up being our hottest time of the year in the end.


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.

Ally Pally Snowman
Wednesday, June 18, 2025 5:12:53 PM

UKMO best of the 12s  , HP builds back in very strongly. 

https://www.wetterzentrale.de/en/topkarten.php?map=1&model=ukmhd&var=1&run=12&time=168&lid=OP&h=0&mv=0&tr=24#mapref 


Bishop's Stortford 85m ASL.
Ally Pally Snowman
Wednesday, June 18, 2025 5:31:46 PM

AIFS is rubbish again though


Bishop's Stortford 85m ASL.
Wednesday, June 18, 2025 5:36:05 PM

Cant believe all the wrist slitting over not getting 40c on here and nw.

It's all standard fare in the end. Lovely to see the heat quickly dissappear Sunday.


Berkshire
johncs2016
Wednesday, June 18, 2025 5:42:32 PM

Cant believe all the wrist slitting over not getting 40c on here and nw.

It's all standard fare in the end. Lovely to see the heat quickly dissappear Sunday.

Originally Posted by: The Dub Version 

I can see that you've been closely following Richard From Aberdeen's posts having used one of his most famous phrases on here.

😂😂😂


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.

bledur
Wednesday, June 18, 2025 5:46:10 PM

No one ever says any of this when it’s disruptive  snow and ice 

Originally Posted by: Matty H 

Fair point but "Disruptive" Snow and ice is becoming a rarity with milder winters , yet more extreme heatwaves seem to be more common.

Ally Pally Snowman
Wednesday, June 18, 2025 5:54:04 PM
Arpege keeps the faith going for a record breaking 36c on Saturday before that 33c tomorrow and Friday 
Bishop's Stortford 85m ASL.
Wednesday, June 18, 2025 6:10:26 PM

UKV matches the ARPEGE with a 36C too...

 UserPostedImage

Ally Pally Snowman
Wednesday, June 18, 2025 6:14:01 PM

UKV matches the ARPEGE with a 36C too...

 UserPostedImage

Originally Posted by: Steel City Skies 

Indeed , the record is on again.


Bishop's Stortford 85m ASL.
Retron
Wednesday, June 18, 2025 6:25:53 PM

This really has been a remarkable warm spell, and with another week or more to go any heat fans in the SE will be delighted. Farmers (and heat haters like me) much less so!

As a reminder, the 91-20 average max down here in Kent is 21 in late June, yet the MetO raw has, for Leysdown, right on the coast:

27 (today), 29, 29, 32, 27, 25, 26. 

The 12z GFS has:

27 (tomorrow), 28, 31, 30, 24, 26, 28.

It's warmer inland, of course, and it's fair to say that in the reliable timeframe there's no end in sight to the warm/hot/dry conditions.

And, if anything, it's been trending hotter. Today was forecast as a high of 24 just yesterday with MetO, for example, yet it reached 27...


Leysdown, north Kent
Jiries
Wednesday, June 18, 2025 6:37:15 PM

This really has been a remarkable warm spell, and with another week or more to go any heat fans in the SE will be delighted. Farmers (and heat haters like me) much less so!

As a reminder, the 91-20 average max down here in Kent is 21 in late June, yet the MetO raw has, for Leysdown, right on the coast:

27 (today), 29, 29, 32, 27, 25, 26. 

The 12z GFS has:

27 (tomorrow), 28, 31, 30, 24, 26, 28.

It's warmer inland, of course, and it's fair to say that in the reliable timeframe there's no end in sight to the warm/hot/dry conditions.

And, if anything, it's been trending hotter. Today was forecast as a high of 24 just yesterday with MetO, for example, yet it reached 27...

Originally Posted by: Retron 

The models, Mef Office and the apps don't take into account that very dry ground temps give 2-3C higher than forecast and for here had reached 27C  so tomorrow expecting my first 30C.  Ensembles show here going up to 16C then drop back to average before rising to above average again with little rain or none for next 2 weeks. 

moomin75
Wednesday, June 18, 2025 6:40:52 PM

AIFS is rubbish again though

Originally Posted by: Ally Pally Snowman 

ECM 12z op is not great either.

Make the most of the next few days is my suggestion. 

Edit. It improves for the south again at least at 216 hours. 


Witney, Oxfordshire

100m ASL

doctormog
Wednesday, June 18, 2025 6:46:19 PM

ECM 12z op is not great either.

Make the most of the next few days is my suggestion. 

Originally Posted by: moomin75 

If you like warm to hot and mostly dry weather you’re in luck, especially if you live in the SE. The ECM shows average temperatures for maybe two days in the next 10 on the 12z ECM. The other days rather from above average to significantly above average.


Ally Pally Snowman
Wednesday, June 18, 2025 6:55:35 PM

ECM 12z op is not great either.

Make the most of the next few days is my suggestion. 

Originally Posted by: moomin75 

It's weird the charts look poor but the actual weather in the SE is ok. Poor in the NW though


Bishop's Stortford 85m ASL.
Rob K
Wednesday, June 18, 2025 7:22:27 PM

GFS 12Z is another, on the face of it "less good" run but still gives barely 5mm of rain across the south by 384 hours. 

Quite a different picture further north and west, but HP never really loses its grip down here.


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

moomin75
Wednesday, June 18, 2025 7:28:36 PM

GFS 12Z is another, on the face of it "less good" run but still gives barely 5mm of rain across the south by 384 hours. 

Quite a different picture further north and west, but HP never really loses its grip down here.

Originally Posted by: Rob K 

Yep, that sums everything up. Typical summer patterns, nothing exceptional on the cards, but usable weather for the Midlands southwards.


Witney, Oxfordshire

100m ASL

Rob K
Wednesday, June 18, 2025 7:32:35 PM

Yep, that sums everything up. Typical summer patterns, nothing exceptional on the cards, but usable weather for the Midlands southwards.

Originally Posted by: moomin75 

Not that typical to have such an extended spell of high pressure in "high summer". And most welcome.

I just hope it doesn't do its usual collapse when the schools break up.


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

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