Storm/convection Discussion

[JamieUK]

Could be a few things, but I would imagine it is the downdraught from the within the cloud. Although the storm is moving NE, the downdraught would occur to the Western flank, thus moving the clouds in a W/NW direction. It could be the result of inflow winds - i.e. if the storm is still organising, it could be drawing on slightly moister air from the southern region, meaning the clouds along this path could be moving NW. It could also be rotation, keep your eyes peeled for possible funnels!

The air flow around any form of shower or storm can be so turbulent, the winds and therefore the clouds can move in really any direction.

Hey Harry, thanks for that!

Havn't seen any funnels though!

[SnowJoke]

Hey Harry, thanks for that!

Havn't seen any funnels though!

Here you go Jamie, just so you dont feel left out

[valiant]

Real downpour here with distant rumbles of thunder.

(correction .. BIG Hammer Horror type crash of thunder )

Edited August 25, 2009 by valiant

[karyo]

It's funny but the shower that's affecting my area currently has gone extremely slow moving and there's hardly any wind! I think it is backbuilding which is a good job as the radar shows there is nothing else to my west.

Karyo

[cyclonic happiness]

Just had a heavy thundery shower with huge raindrops and hail thrown in, lasted about 10 minutes and dumped loads of rain.

[Harry]

Here you go Jamie, just so you dont feel left out

LOL that has really tickled me!!!

[JamieUK]

Here you go Jamie, just so you dont feel left out

Hahaha! Funny man

[Lewis]

Hey peeps, a busy guy recently so i have not had the time to post on here.

It's currently around 21.6c with a dew of 15.7c so it's possible for some storms i would imagine, it has clouded over and some showers all be it very light are approaching me now. But the clouds/haze in the distance has a funny looking colour to it.

Will keep you all posted.

What are the storms like south of me then peeps? are they pretty intense.

[Coast]

Thought take a quick gander at the closest 12z sounding for today to see how it compares with the Herstmonceux one for yesterday - AKA 'the second August violent non-storm of 2009'

I don't think this is more encouraging than yesterday, in fact a lot less, but there's a whole heap more happening out there at the moment!

*** NexStorm TRAC Report generated 25/08/2009 16:28:43

Tracking 1 thunderstorms

-------------------------------------------------------

Thunderstorm ID I-3341 detected 15:08

Storm location bearing 355.3 dgr distance 218 miles from Worhting

Last recorded activity 16:26

Intensity class Weak

Intensity trend Weakening

Current strikerate 6/minute

Peak strikerate 7/minute

Total recorded strikes 147

Cloud-Ground strikes 90 - 61.22%

Intracloud strikes 57 - 38.78%

-- Strike type distribution --

Positive Cloud-Ground [+CG] 2 - 1.36%

Negative Cloud-Ground [-CG] 88 - 59.86%

Positive Intracloud [+IC] 48 - 32.65%

Negative Intracloud [-IC] 9 - 6.12%

Edited August 25, 2009 by Coast

[Harry]

Thanks for that Harry. Ever thought about becoming a storms forecaster for Netweather? What with your wealth of knowledge on storm development.

This is precisely why this is my hobby and not a career, lol

[sunny scunny]

There's a line of heavy showers very close to me now.Hopefully they won't lose there intensity

[Lewis]

There's a line of heavy showers very close to me now.Hopefully they won't lose there intensity

Ime once again in the gap of all the action, doh!

[sunny scunny]

Ime once again in the gap of all the action, doh!

Yeah everything has avoided my area so far today.The next radar image will show if it's game on or game over for my area.

[liambailey09]

Had a cracking little thunderstorm pass over hitchin at about 4.20, although it did cut my cricket match down to just the 1st innings

[sunny scunny]

It's just started thundering here.

[Lewis]

It's just started thundering here.

Its heading my way, showers are moving in a NE direction.

Any lightning?

[sunny scunny]

Its heading my way, showers are moving in a NE direction.

Any lightning?

Not yet but the rain has just arrived and it's heavy

It's cleared already so it was only a brief heavy shower.

Edited August 25, 2009 by sufc

[Lewis]

Not yet but the rain has just arrived and it's heavy

It's cleared already so it was only a brief heavy shower.

Its heading my way now, i think you got the lighter edge of the shower. just walked to the shop then and can see parts too it, i'm taking a direct hit

[A.J]

Just got back from stoke-on-trent...Had an *ahem* thundery shower ( ) on the way up, I stopped at Stafford services on the M6 for a coffee around 4pm....witnessed 2 flashes of sheet lightning, counted 5 rumbles of thunder and half an hours worth of crackling & popping on AM radio

[sunny scunny]

Very dark here with another downpour passing through.

[Costa Del Fal]

GFS still shows a chance for storms on Friday for Wales, The Midlands and East Anglia.

Marginal Cape again but other ingredients a bit better than today again with better TT Index, Some LL Shear in place and slightly better lapse rates.

Again, will need watching over the next couple of days.

[snow raven]

Just got back from a day out at Whipsnade Zoo in Bedfordshire - had a cracking thunderstorm this afternoon with hail - lasted a good 45 minutes. Just an added bonus to a brilliant day

[StormChaseUK]

Went up the Chilterns this afternoon to watch the storm gust it's way nicely from Thame over to Aylesbury.

[Harry]

Yep, another day which hints at some storm potential plus another area of interest is the strength of the wind from the LP system. Mean wind speeds of 22mph with gusts of nearly 50mph acccording to the Met Office. If convection can occur then it could be quite a stormy day.

Well, on a W or NW flow, that leaves the SE in good stead! At the moment, the best place to be will probably be C and E Midlands and E Anglia, though I wouldnt be at all surprised if some jump across to Kent and Essex too

[Costa Del Fal]

18z for Friday stays pretty similar if perhaps even better. Storm risk extends to Northern England too. LL Shear is even better, similar lapse rates, Cape a bit better even though pushed a little further north.