The Weather Outlook

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Crepuscular Ray
21 July 2025 17:25:52

A huge cloudburst here with a couple of loud thunderclaps


Jerry

Edinburgh, in the frost hollow below Blackford Hill

Retron
21 July 2025 17:35:00

Near-constant thunder from the NW, and no wonder - I've never seen so many off-the-scale pixels on the NW radar before! For reference the deep purple is in excess of 250mm/hour rainfall rate.

And on the ground, the view to the NW is most ominous. It's not coming this way but instead will head out over the North Sea...

https://ukwct.org.uk/weather/storm.jpg 

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https://ukwct.org.uk/weather/storm2.jpg 

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Leysdown, north Kent
Brian Gaze
21 July 2025 18:03:39

Near-constant thunder from the NW, and no wonder - I've never seen so many off-the-scale pixels on the NW radar before! For reference the deep purple is in excess of 250mm/hour rainfall rate.

And on the ground, the view to the NW is most ominous. It's not coming this way but instead will head out over the North Sea...

https://ukwct.org.uk/weather/storm.jpg 

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https://ukwct.org.uk/weather/storm2.jpg 

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Originally Posted by: Retron 

Checking manually, I can see a 366.09mm/hr. I'm sure there are higher rates in there somewhere.  😂

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Brian Gaze

Berkhamsted

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johncs2016
21 July 2025 18:05:48
A few further rumbles of thunder here in Hawick but everything is very slow moving with all of the rain remaining to our north and west resulting in It somehow still remaining bone dry here as it has been all day.
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.

Retron
21 July 2025 18:07:31

Checking manually, I can see a 366.09mm/hr. I'm sure there are higher rates in there somewhere.  😂

Originally Posted by: Brian Gaze 

The funny thing is, I had a blocked rain gauge yesterday - I went out after a downpour, poked a small screwdriver down the hole (clearing the jam) and it went clack-clack-clack... clack..... clack. That came up as a 372mm/hour rainfall rate, draining as fast as it could, although of course the reality was nothing near as heavy.

I can barely imagine what that would look like as genuine rainfall, and I suspect it's a good thing that pixel wasn't over an inhabited area!


Leysdown, north Kent
johncs2016
21 July 2025 18:15:49
The rain from our nearby storm is now dying out as the storm gradually decays in situ without any of its rain reaching us despite some very bright and intense echoes showing up very close to here on the radar maps only a short time ago.
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.

Retron
21 July 2025 18:25:03

Amazing... I've just come in from the garden, watching another active storm to the south. The thunder is constant - I recorded a few minutes' worth just for posterity, and then huge raindrops started falling so I had to come in.

I can't remember the last time there was such prolonged constant thunder, one peal merging into another and another and so on, the clouds flickering with lightning!


Leysdown, north Kent
Chunky Pea
21 July 2025 18:27:13

've never seen so many off-the-scale pixels on the NW radar before! For reference the deep purple is in excess of 250mm/hour rainfall rate.

Originally Posted by: Retron 

When you are under a 250mm/h + rain rate, you'll know about it. Vis down to dense fog level. 


Patrick,

East Galway, Ireland.

Andy J
21 July 2025 18:36:14

Went to Lincoln for a 3.10pm appointment and by 3.30pm there was a monster of a downpour in progress. Some extraordinary lightning flashes and thunderclaps. A lot of surface water. We took an alternative higher route home to avoid sections that often flood. Still in progress and we expect more here.

Originally Posted by: Roger Parsons 

Hi Roger.  Wow, that was quite some storm then from your perspective.   Could see it from Gainsborough moving very slowly southeastward, and could tell it was quite a significant storm due to almost continuous rumbling thunder, and did see an arcing lightning flash from it.   We only got 2mm of rain from it, as we were a little bit west of the main action.  


Gainsborough, Lincolnshire.
fairweather
21 July 2025 18:42:57

Had a ten minute downpour and a couple of claps of thunder. 2mm fell in that time. Still nothing much has happened here as I watch Canterbury getting it as it glides past me yet again! It seems Canterbury is some sort of rain magnet as it has now got it from the S. the S.E, the SW and now the WNW. Never been able to figure why it always misses here - must be just the same bad luck as with the snow!

The dribs and drabs have added up now and in 3 days I have had over 20mm which is high for this year. 


S.Essex, 42m ASL
lanky
21 July 2025 20:35:44

The funny thing is, I had a blocked rain gauge yesterday - I went out after a downpour, poked a small screwdriver down the hole (clearing the jam) and it went clack-clack-clack... clack..... clack. That came up as a 372mm/hour rainfall rate, draining as fast as it could, although of course the reality was nothing near as heavy.

I can barely imagine what that would look like as genuine rainfall, and I suspect it's a good thing that pixel wasn't over an inhabited area!

Originally Posted by: Retron 

Using a record 60 second rainfall of 38mm and converting that to an hourly rate gives a phenomenal 2280mm/hour rate as a value for the most intense rainfall ever recorded

https://en.wikipedia.org/wiki/List_of_weather_records#Precipitation 


Martin

Richmond, Surrey

The Beast from the East
22 July 2025 00:08:44

Amazing... I've just come in from the garden, watching another active storm to the south. The thunder is constant - I recorded a few minutes' worth just for posterity, and then huge raindrops started falling so I had to come in.

I can't remember the last time there was such prolonged constant thunder, one peal merging into another and another and so on, the clouds flickering with lightning!

Originally Posted by: Retron 

I saw the system that hammered Kent, got a sideswipe from it here, but you could see it developing and the lightning and thunder was merged. After the nice day, it was a surprise as I thought we were out of the woods


Purley, Surrey, 70m ASL

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sunny coast
24 July 2025 07:42:13

Yesterday produced a cracking thunderstorm xhere juat north of Eastbourne.  25 mm rain more locallyin aome spots  and some huge cracks of thunder .  Perfect conditions here with a light Northerly converging with the seabreeze producing a convergence line along the south downs . Storms in the vicinity from late morning onward  with the towers rising rapidly.  Flattened just as quickly  tho by 6pm . 

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