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Uk Convective General Discussion & Forecasts, 17th July 2012>

lightning thunderstorm funnel cloud tornado

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#641 Flash Elvis

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Posted 29 July 2012 - 20:50

Another Storm to my West...great lightening!! Wasn't expecting this so late

#642 No-Time Toulouse

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Posted 29 July 2012 - 21:02

Another Storm to my West...great lightening!! Wasn't expecting this so late


Don't be cruel!!!Posted Image

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#643 East_England_Stormchaser91

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Posted 29 July 2012 - 21:24

Wahey! Thunder and lightening, wasn't expecting this so late in the day.


God I thought you would have! It looked blacker than the ace of spades down South of Peterborough!

#644 MP-R

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Posted 29 July 2012 - 21:27

It's started! Coming in over Weston again!


Yep, heavy shower moved through here, albeit not as dramatic as early this morning. It's fascinating to watch though, must be something to do with nocturnal cooling rather than the Estuary. This would be an amazing setup for streamer snow in winter with deep cold from a returning northerly turned westerly e.g. 21st December 2009.

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#645 DeepSnow

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Posted 29 July 2012 - 22:02

Just seen an unexpected CG lightning strike and had 2 rumbles of thunder from a shower around 10miles to my east, shame its moving away from me! Didn't think we were to expecting anything at night?
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#646 Panayiotis

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Posted 29 July 2012 - 22:52

Just seen an unexpected CG lightning strike and had 2 rumbles of thunder from a shower around 10miles to my east, shame its moving away from me! Didn't think we were to expecting anything at night?

ooo i hopes it passes over me!

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#647 Minimace (guest)

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Posted 30 July 2012 - 00:00

Took a couple of pics earlier that I thought people on here might like! Have been looking at the forum for a while and have learnt loads!

Took these pics over in Cambridge

Posted Image

Posted Image

And then managed to get these in northampton

Posted Image

Posted Image

Edited by Minimace, 30 July 2012 - 00:04 .


#648 Mikel Nimbus

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Posted 30 July 2012 - 00:50

Was watching that storm from the south of you, interesting radar returns, did change direction a few times.

Not suprised re funnel cloud, maybe the boss Paul Sherman could add more.


Here's the radar when the video was taken. I've estimated that it was somewhere over Southgate at the time.


random


And here's the video. Gutted because my Iphone is as slow as a donkey and while the recording app was loading the funnel lost some of its size and was in its dying stages by the time I started filming. Also the pixels mean you have to look closely for the rotation but believe me it was certainly there.

http://www.youtube.com/watch?v=z4E501WKn9I&feature=plcp

A short while later a low hanging cloud formed visibly sucking up moisture into its base. Wall cloud maybe but difficult to be sure from that distance and low light.
IMG 2589

Edited by Mikel Nimbus, 30 July 2012 - 01:07 .


#649 SteveB

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Posted 30 July 2012 - 06:01

More heavy rain last night adding another 30mm+ to the monthly total which now stands at 258.6mm. Was even treated to a a flash of lightning & two rumbles of thunder.

#650 Terminal Moraine

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Posted 30 July 2012 - 06:07

More heavy rain last night adding another 30mm+ to the monthly total which now stands at 258.6mm. Was even treated to a a flash of lightning & two rumbles of thunder.


That is mightily impressive, Steve, and the sort of thing I think about as I drift happily off to sleep.
Yesterday was my 9th consecutive day with less than 1mm of rain ( 8 of them with none ); a month which started with great potential completely ruined.
Patiently awaiting the return of the Younger Dryas.

#651 Coast

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Posted 30 July 2012 - 06:56

I can't get on to ESTOFEX this morning so straight into UKASF:

Storm Forecast Slight
Forecaster: Dan
Last Updated: 2012-07-29 21:48:00
Valid: 2012-07-30 00:00:00 - 2012-07-30 23:59:00

Posted Image

Synopsis:

Upper trough pivots and becomes negatively-tilted, with axis from the Faroes to Denmark. Main jet shifts northwards on the southern flank over southern Britain. Convective showers are likely over northern Britain under the centre of the upper trough.

Discussion:

Diurnal heating will result in 500-600J/kg CAPE, allowing scattered showers and a few weak thunderstorms to develop. With weak shear, a series of 'pulse-type' thunderstorms is expected, and given cold/dry air aloft, hail is likely in stronger cores, potentially up to 2.0cm in diameter locally.

A better overlap of shear is expected over south Yorkshire and into Lincolnshire, and it is here that cells may become better organised, with the chance of a funnel or weak tornado. Showers will rapidly decrease in coverage during the evening as daytime heating subsides and ridging develops ahead of the next frontal system.


21st OWS have everything in the North sea this morning, much like the UKASF map:

Posted Image

ESTOFEX based lightning wizard also down at the moment so here's the simple GFS as an indicator for the day:

Posted Image

Posted Image

Looks like its isolated and in Eastern Scotland today, I'll stick some other charts/info up as and when it becomes available.

Posted Image

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#652 SteveB

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Posted 30 July 2012 - 07:02

That is mightily impressive, Steve, and the sort of thing I think about as I drift happily off to sleep.
Yesterday was my 9th consecutive day with less than 1mm of rain ( 8 of them with none ); a month which started with great potential completely ruined.


Very wet month indeed, it ended the same way as it started, with two nights of heavy rain on the 3rd & 4th & 29th & 30th. I think those four days alone added 100+mm to the total.

#653 Keraunophile

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Posted 30 July 2012 - 07:12

Took a couple of pics earlier that I thought people on here might like! Have been looking at the forum for a while and have learnt loads!

Took these pics over in Cambridge

Posted Image

Posted Image

And then managed to get these in northampton.

Posted Image

Posted Image


Very impressive photos Minimace. Thanks for sharing and welcome to Netweather.

Edited by Keraunophile, 30 July 2012 - 07:13 .

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#654 legritter

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Posted 30 July 2012 - 07:38

Had some very impressive bursts of rain during last night at one point, but for a very short duration it was torrential. I had a look on radar but it was very local and didnt appear to travel too far inland, plus showers seemed to pop up very quick and it was only a quick look on radar between sweat dreams. Was there any thunder about and anybody with a rain gauge for total?

heers Posted Image

#655 Nick F

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Posted 30 July 2012 - 08:33


Valid: 30/07/2012 09:30 - 31/07/2012 00:00
Headline: ... THERE IS A RISK OF THUNDERSTORMS FORECAST...

convmap_300712.jpg

Synopsis
A cyclonic flow around low pressure close to Scotland will bring a showery regime across the UK on Monday.

... SCOTLAND, N IRELAND, N ENGLAND ...

Coldest upper temps will be across northern UK today (towards -26C at 500mb across Scotland) so here we will see steepest lapse rates and greatest risk of diurnal storms developing with surface heating. Weakly-sheared environment will mean severe weather is unlikely. Storms maybe accompanied by hail, gusty winds and heavy rain which may lead to localised flooding
.


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Tornadoes seen to date:


Fredericksburg (TX) 01/05/07, Stafford (KS) 05/05/07, Medicine Lodge (KS) 06/05/08, Hooker (OK) 05/05/08, Stuttgart (AR) 10/05/08, Big Spring (TX) 14/05/08, Sielbert (CO) 21/05/08, Hoxie (KS) 22/05/08, Collyer (KS) 22/05/08, Dighton (KS) 23/05/08, Ness City (KS) 23/05/08, Ellis (KS) 23/05/08, Quinter (KS) 23/05/08, Pratt (KS) 26/05/08, Kearney (NE) 29/05/08, Aurora (NE) 29/05/08.

#656 lorenzo

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Posted 30 July 2012 - 09:57

Looking forward to seeing what today brings. A quite look through the Soundings shows the East of the country set to catch the fun today, with less CAPE inland.. Looks like the North Sea is the place to be !

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#657 NUT

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Posted 30 July 2012 - 11:59

Showers getting going a little here now but nothing major (yet)
John, Cumbernauld, Glasgow.

#658 citizenx

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Posted 30 July 2012 - 13:53

Admittedly, not storm pics but very changeable out there, managed to catch this a few mins ago.

Posted Image

#659 Coast

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Posted 30 July 2012 - 14:06

Admittedly, not storm pics but very changeable out there, managed to catch this a few mins ago.


Great shot, could you just stick you location in your profile so we know roughly where it was taken please? :good:

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#660 citizenx

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Posted 30 July 2012 - 14:16

Great shot, could you just stick you location in your profile so we know roughly where it was taken please? Posted Image


Thanks, yeah.. fair point. Done! For clarity, i'm on the north east (England) coast.