Author Topic: 10 Aug 2020 Thunderstorm  (Read 1018 times)

Offline Brains

  • forum hero
  • *****
  • Posts: 2345
10 Aug 2020 Thunderstorm
« on: August 11, 2020, 03:14:56 pm »
Hi Peeps,
Was around the Lune Valley and up to Kingsdale today and extensive flooding was visible everywhere. By Valley Entrance a small stream was running down the fell on the surface, and the beck in spate. In Ingleton we were told there had been an extensive audio-visual display with lots of rain.
First off, hope everyone is safe and not suffered any damage, and secondly anything of caving interest noted as a result of the deluge?

Offline Fulk

  • forum hero
  • *****
  • Posts: 4290
Re: 10 Aug 2020 Thunderstorm
« Reply #1 on: August 11, 2020, 03:33:17 pm »
Here – just south of Kendal – we had quite a spectacular storm last night, that started just before midnight and was still rumbling on between 4 and 5 o’clock this morning. Lightning flashes at times seemed to be almost continuous; I got up to watch, and timed three sequences. In one, I counted 22 flashes in a minute, then 23 and then 50 in just over two minutes, but oddly, there was much less thunder than I would have expected. Given the intensity of the lightning, I’d have expected a continuous rumble of noise. The rain varied between very heavy and relatively light. This morning I looked at the footage from the CPC Horton-in-Ribblesdale webcam, where there was no change in water level at all. It just goes to show the localized nature of these events.

Offline Benfool

  • obsessive maniac
  • ***
  • Posts: 495
Re: 10 Aug 2020 Thunderstorm
« Reply #2 on: August 11, 2020, 05:18:21 pm »
yep, incredibly localised!

Selside: 6mm
Helworth Bridge: 5mm
Ribblehead: 7mm
Clapham: 24mm

I find it really weird that there was only 7mm at Ribblehead, but just over Whernside in Kingsdale it appears to of been biblical! Just shows how localized Dales weather can be!

B


Offline mikem

  • forum hero
  • *****
  • Posts: 3738
  • Mendip Caving Group
Re: 10 Aug 2020 Thunderstorm
« Reply #3 on: August 11, 2020, 05:30:55 pm »
Not quite up to the 48mm they had around Bala in North Wales late yesterday...

Offline Fulk

  • forum hero
  • *****
  • Posts: 4290
Re: 10 Aug 2020 Thunderstorm
« Reply #4 on: August 11, 2020, 05:40:10 pm »
Many years ago I was down Alum Pot when we heard thunder, and decided that it was time to make a sharp exit; in fact, there was a thunderstorm rolling around the west side of Ingleborough that caused flooding on that side (and the death of a caver in Sunset Hole), but the storm completly missed the east side.

A day or two later I went down Meregill Hole and was utterly gob-smacked to see flood debris about 50 feet up the 4th pitch; above that level, the shaft was its usual clean-washed self, below it was festooned with bits of grass and other debris, as, indeed, was the entire rest of the cave down to the low bit before the sump, obviously showing that up to 50 ft up that shaft, the entire cave had been filled with water. (And if you've never been down Meregill, that's a lot of water!!)
« Last Edit: August 11, 2020, 05:55:16 pm by Fulk »

Offline paul

  • Global Moderator
  • forum hero
  • *****
  • Posts: 4486
  • Orpheus CC, NPC
    • Orpheus Caving Club
Re: 10 Aug 2020 Thunderstorm
« Reply #5 on: August 11, 2020, 06:48:48 pm »
No sign of it on the CPC Horton in Ribblesdale webcam: https://webcam.io/webcams/zKaEg9/2020-08-10 - Ah - just noticed this was already pointed out by Fulk already.
I'm not a complete idiot: some parts are missing!

Offline AR

  • Black shadow
  • forum hero
  • *****
  • Posts: 1285
  • PDMHS, ATAC, ANHMS
Re: 10 Aug 2020 Thunderstorm
« Reply #6 on: August 12, 2020, 10:12:01 am »
It was the Peak District's turn last night - quite a lightshow over Stoke/Crewe way 10.30 last night when I put the milk bottles out  but little or no thunder, then got woken up at about 1AM by the rain hammering down and masses of high-level lightning overhead here.
I don't know about flooding as I've not been "off the hill" today, anyone been down Stoney this morning and seen how much debris is on the A623?
Dirty old mines need love too....

Offline mikem

  • forum hero
  • *****
  • Posts: 3738
  • Mendip Caving Group

Offline A_Northerner

  • menacing presence
  • **
  • Posts: 210
  • SUSS 'til you die
Re: 10 Aug 2020 Thunderstorm
« Reply #8 on: August 12, 2020, 10:40:11 am »
It was the Peak District's turn last night - quite a lightshow over Stoke/Crewe way 10.30 last night when I put the milk bottles out  but little or no thunder, then got woken up at about 1AM by the rain hammering down and masses of high-level lightning overhead here.
I don't know about flooding as I've not been "off the hill" today, anyone been down Stoney this morning and seen how much debris is on the A623?



Taken from Stoney Flood Group.

From Sheffield we caught the light show in the Peak around 2pm and then an hour later the biblical rain descended. Think it was very localised. Chatter on the Buxton weather group was pretty intense. Loads of weather-chasers saying it was the worst storm they'd ever seen.
Sweet is the sound of the pouring rain,
And the stream that falls from hill to plain.

Offline mikem

  • forum hero
  • *****
  • Posts: 3738
  • Mendip Caving Group
Re: 10 Aug 2020 Thunderstorm
« Reply #9 on: August 12, 2020, 11:12:03 am »
Their website only records 21mm:
https://www.buxtonweather.co.uk/

& Stoney 14mm in 4 hours (but 5mm of that was in one 10 min period):
http://my.meteoware.com/en/992776/today/
« Last Edit: August 12, 2020, 11:20:52 am by mikem »

Offline andrewmc

  • BCA ind. rep.
  • junky
  • ****
  • Posts: 905
  • EUSS, BEC, YSS, SWCC...
Re: 10 Aug 2020 Thunderstorm
« Reply #10 on: August 12, 2020, 01:39:55 pm »
Given the massive clouds rising to the north of Ingleton, combined with the very high temperatures, I suspect we may be in for round 2 later this evening...

Offline mikem

  • forum hero
  • *****
  • Posts: 3738
  • Mendip Caving Group
Re: 10 Aug 2020 Thunderstorm
« Reply #11 on: August 13, 2020, 08:24:33 am »
Was Bristol's turn for the light display last night.

Offline mikem

  • forum hero
  • *****
  • Posts: 3738
  • Mendip Caving Group
Re: 10 Aug 2020 Thunderstorm
« Reply #12 on: August 14, 2020, 08:53:43 am »
& Dartmoor last night - 22mm in 2 hours (Dart rose 80cm in very short order...)

 

Main Menu

Forum Home Help Search