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Jane Louise

Storm and convective discussion 7th July Onwards

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And it's on with a new thread :D  I've had 4 rumbles in the past 2 days :) not bad considering I have been very storm starved for a very long time Lol. Looks to be more tomorrow, now who's going to strike lucky tomorrow  :) It's a shame I have nothing here tonight as the convection is awesome. Anyway, here's hoping to read some great reports and don't forget your pics and videos which are most appreciated :D

Good luck everyone :drunk:

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Had a torrential downpour here about half an hour ago which didn't look like much

on radar but still managed to produce some hail before it cleared away.

 

Another interesting day tomorrow with that trough lying across Eastern areas.

 

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Posted this on the Scottish regional thread yesterday, thought I would share it here. My first live twister !!!!!

Yesterdays storm over Dundee 6/7/14 about 12:15pm .......

Posted Image

Posted Image

Posted Image

Posted Image

The storm then passed directly overhead and I shot this wee video

Edited by Polarlow

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Heavy rain here. At least it held off for the Grand depart at the weekend

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Evening all 

 

Storm just arriving in our area from the SE, Moderate rain flashes & Noise, unsurprising really given the glorious day we have had.

 

LO

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nothing new there then !!!.....

 

Lol,yeah another day,another supercell. :laugh:

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Lightning alarm going off already to my south and east , distance rumbles can be heard , hopefully the start of a great day

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I have a question about 'thunder days'.

Who exactly measures if thunder has been heard or not and does it have to be above a certain noise level?

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Crazy 'monsoon' type weather currently with frequent thunder and lightning..

post-5386-0-14274300-1404806203_thumb.pn

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Frequent lightning display over towards the coast to my north east (I'm in Newcastle), and I can see another smaller storm coming up to the south of it.

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Send it north NL :) There have been reports of thunder to my east (from mother-in-law Catch). Nowt here yet but it's very early doors and looks promising for later.

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I'm at the north end of the TS line from Durham to E.Lothian, rumbling away

I have a question about 'thunder days'.Who exactly measures if thunder has been heard or not and does it have to be above a certain noise level?

I would imagine it isn't really a thunder day but a lightning day, as the sferics are recorded and they could tot up that data each day. Not sure though, it is a Met Office stat you could check with them

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A met observer would record any thunder heard at the station, that practice has now stopped as weather stations have become automatic. Amateurs such as myself still keep a thunder heard days record simply of any day we hear thunder at our location.

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as Tony H posts things have changed since the 80-90 human observing stations and the WMO definition of what a thunderstorm was. I suspect as Jo suggests re sferics and it may need an e mail to Met to find out what is their definition now with so few full time observers around?

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Hmmmmm, nobody has mentioned this yet, and I do use the BBC weather forecasts as a basic start point.... 

What do you think, and could it have an associated storm risk???

 

I know it's a newspaper that's rebound for sensationalistic weather front pages, but surely it's got to be based on facts from somewhere???

 

Monday 7th July 2014

post-22284-0-71441600-1404809304_thumb.j

Edited by Speedway Slider

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Measuring Thunder Days....

Surely, must be based on Lightning strikes...?

I have looked back on a thread, but can't remember where the query was answered... Not all lightning is recorded by detectors?  especially inter - cloud?

So accuracy of thunder days recorded also inaccurate?

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I can't see how they could measure "thunder days" other than with a lightening detector. Most observation sites are now completely automated

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I've emailed someone at the MetO who could ask the stats people

 

National Climate Information Centre (NCIC) UK Met office

"NCIC have produced long-term averages of days of thunder for the 1961-1990 and 1971-2000 averaging periods for the UK, but not for 1981-2010. Monthly days of thunder gridded datasets were produced up to December 2010, but this has subsequently been stopped as the network has become increasingly sparse."

 

so it was manually recorded in the hourly obs for many decades but now as many stations are automatic  the thunder days are not recorded enough. Lightning is recorded as an alternative dataset

Edited by Jo Farrow

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Hmmmmm, nobody has mentioned this yet, and I do use the BBC weather forecasts as a basic start point.... 

What do you think, and could it have an associated storm risk???

 

I know it's a newspaper that's rebound for sensationalistic weather front pages, but surely it's got to be based on facts from somewhere???

 

Monday 7th July 2014

:rofl:

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:rofl:

Ahh, didn't have the smiley until I put this into a quote.....

So, is there info to base this approaching heatwave on somewhere?

                      OR

Is it totally an unfound headline story indicitive of this rag.....??

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