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Thunderstorm Outlook - Wed July 23rd (low risk)

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Author Topic: Thunderstorm Outlook - Wed July 23rd (low risk)  (Read 491 times)
martinastro
Martin Mc Kenna
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« on: July 23, 2008, 01:57:49 pm »

From Tony Gilbert. He stresses this is VERY low risk.

UPDATE 1.20pm Weds

As per earlier forecast, but given the likely mid level subsidence ie, NVA, weak moisture, and poor upper lapse rates my forecast is now for sharp shallow convective showers with a small risk of sferics. In short with weak mid level cooling and the unlikelyhood that storms will reach any great height this will have the net effect of reducing the chance of sferics today. I am, however still intrigued at the prospect of funnel development around North Wales, specifically over the mountain region of Snowdonia Park. Steady onshore breeze at low levels undercut 12 kts at 850 mb creating a sharp and shifting surface boundary.


« Last Edit: July 23, 2008, 01:59:33 pm by martinastro » Report Spam   Logged

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martinastro
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« Reply #1 on: July 23, 2008, 02:26:47 pm »

Showers and t-storm sferics have just ignited on the west coast of Ireland.
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brianb
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« Reply #2 on: July 23, 2008, 03:14:08 pm »

Getting thunderstorm type migraine Undecided

Also need to shut down PC to clean dust from fans, I'm getting temp alarms Angry

22C outside - no sun, and very humid!
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martinastro
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« Reply #3 on: July 23, 2008, 04:00:26 pm »

Very hot here to with hazy semi clear sky and some cumulus which looks to be hitting a cap and rolling over at the top.

Good idea about the dust fans. Last year our fan was rotating too fast because of dust build up and overheating. One of the circuit boards melted. Had to get a new one!
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martinastro
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« Reply #4 on: July 23, 2008, 07:00:35 pm »

BBC Newsline giving scattered possibly thundery showers tonight for parts of N. Ireland and Thurs morning. Still warm and humid here with unstable looking altocumulus developing and possible Castellanus. Looks elevated so you never know.
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brianb
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« Reply #5 on: July 23, 2008, 09:02:20 pm »

It looks as well as feels thundery now, and my migraine is fully convinced.

View to the West from Portballintrae at 20:50 BST:


Canon 40D, 50mm, 1/50sec @ f/8, ISO 100
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martinastro
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« Reply #6 on: July 23, 2008, 10:09:13 pm »

Nice image Brian!. Just spent several hours at Ballyronan at the NW shore of Lough Neagh. Wide spread altocu castellanus (best I've ever seen) and about 10 different mammatus displays. Sky looks very unstable indeed. Got loads of images.
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Roman White
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« Reply #7 on: July 24, 2008, 02:39:38 pm »

Nice mammatus capture, Brian
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