Convective/Thunderstorm Discussion: Summer/Autumn/Winter 2014-15

Bsal · 13-06-2014 2:36am

We should have some nice cells pop up in the east during the afternoon and some convergence at the coast.

lolie · 13-06-2014 11:46am

Bsal wrote: »

We should have some nice cells pop up in the east during the afternoon and some convergence at the coast.

Few sparks maybe?

sparrowcar · 13-06-2014 5:23pm

Well anyone think we might get a spark or two this eve?
I see some cells building over the midlands.

spooky woo · 13-06-2014 6:12pm

Cells over balieborough co cavan

M.T. Cranium · 13-06-2014 7:01pm

Within 30-50 km of Athlone possibly a brief thunderstorm now to sunset. Not very fast moving and likely to become non-thundery after midnight further into Westmeath, Meath, Louth, east Ulster.

Danno · 13-06-2014 7:12pm

Lightning detector picked up two strikes from the Roscommon/Longford shower... heavy shower rolled through here and gave a rain rate of 28mm/hr briefly and dark sky to boot... no thunder heard tho...

lolie · 14-06-2014 1:28am

Nice few sparks in southern England now.
images.aspx?jaar=-3&voor=&soort=loop-bliksem&c=&n=&tijdid=2014614223

lolie · 14-06-2014 4:05pm

Some epic lightning reported in parts of southern England last night.
At least 10 houses in Reading damaged by lightning.
Wonder did Harps see any of it.

5 second exposure shot from twitter.

Harps · 14-06-2014 6:16pm

lolie wrote: »

Some epic lightning reported in parts of southern England last night.
At least 10 houses in Reading damaged by lightning.
Wonder did Harps see any of it.

Didn't even know about it until I heard on the news that Gatwick Airport was hit last night! I'm a light sleeper so assume it bypassed me

lolie · 15-06-2014 12:18am

Harps wrote: »

Didn't even know about it until I heard on the news that Gatwick Airport was hit last night! I'm a light sleeper so assume it bypassed me

It caught a lot of people by surprise.
I was gonna txt the brother in Tooting but thought it would prob die out but it kept going.
He's up at 6 all week so prob wouldn't have stayed up to late.
Wasn't to far from London.

Video · 18-06-2014 12:16am

Thunderstorm tomorrow? Cape over 1200 -4 LI in some places... very high temps for this time of year..

maquiladora · 18-06-2014 1:12am

Video wrote: »

Thunderstorm tomorrow? Cape over 1200 -4 LI in some places... very high temps for this time of year..

Moderate risk for southern regions later in the day. Weak cap that will probably break in the late afternoon/early evening, potential for a few airmass storms to pop up.

M.T. Cranium · 18-06-2014 4:54pm

Unofficial (MTC) thunderstorm watch now in place for inland south and west generally speaking along a sea breeze boundary 10-30 km inland from south coast and then north-south from about Cork (city) to Shannon to Galway and then across Connemara towards Westport. Not expecting storms in all these areas but watching radar for development, valid now to 8:30 pm.

Somewhat higher risk in south-central Cork (county) and western Mayo, but would expect if these verify a third area on either side of the Shannon estuary. Cells once formed would likely move southwest in southern portions and south in northern portions of the watch zone.

irobmw · 18-06-2014 6:19pm

Under some dark clouds now in Cork City.

teddybones · 19-06-2014 9:05am

Looks like a few sparks off east coast this morning according to sat 24. Is this right?

El_Dangeroso · 23-06-2014 3:05pm

Has this been linked to on this thread before?

Lightening strikes in real time across Europe:
http://www.blitzortung.org/Webpages/index.php?lang=en

Love the little 'click' sound effects!

Video · 24-06-2014 5:48pm

Very active day for europe

DOCARCH · 24-06-2014 5:52pm

Video wrote: »

Very active day for europe

Spain and Portugal pretending to be a Christmas tree!

http://www.euclid.org/realtime.html

TedR · 24-06-2014 5:55pm

What do the experts reckon... any chance of a spell of thunder/lightning on the end of this current spell of warm weather?
Feels very heavy/close in Dublin. Fingers crossed!

Kermit.de.frog · 24-06-2014 6:30pm

TedR wrote: »

What do the experts reckon... any chance of a spell of thunder/lightning on the end of this current spell of warm weather?
Feels very heavy/close in Dublin. Fingers crossed!

Thursday and Thursday night currently looking interesting with some heavy pulses of rain moving up across the country from the south. Some of this looks very heavy atm in the southeast in particular.

Even tomorrow there is a smaller chance that East Leinster may see some heavy showers and they could have thunder too but it's marginal depending on exactly the wind direction. For storms we would want it just off shore as opposed to an onshore wind.

So a risk tomorrow but a bigger risk by Thursday.

TedR · 24-06-2014 6:33pm

Thanks! Looks like the hot weather breaking soon alright, would be great if we got a bit of action off that

Video · 24-06-2014 7:35pm

Is the UK Met office rainfall radar not fixed yet? the thing was perfect for getting an idea of intensity. Very annoying

Bsal · 24-06-2014 11:35pm

Video wrote: »

Is the UK Met office rainfall radar not fixed yet? the thing was perfect for getting an idea of intensity. Very annoying

They updated the site recently, here's the new radar page with more options available

http://www.metoffice.gov.uk/public/weather/observation/map/u1315b791#?map=Rainfall&fcTime=1403604900&zoom=7&lon=-2.88&lat=52.21

Video · 25-06-2014 12:01am

Bsal wrote: »

They updated the site recently, here's the new radar page with more options available

http://www.metoffice.gov.uk/public/weather/observation/map/u1315b791#?map=Rainfall&fcTime=1403604900&zoom=7&lon=-2.88&lat=52.21

No they used to have one that would forecast where the rainfall would be within a couple of hours... disappointing that's gone

maquiladora · 25-06-2014 12:08am

Video wrote: »

No they used to have one that would forecast where the rainfall would be within a couple of hours... disappointing that's gone

Still there.

http://www.metoffice.gov.uk/public/weather/forecast/map/gcpvj0v07#?zoom=6&map=Rainfall&lon=-4.00&lat=51.73&fcTime=1403607600

Video · 25-06-2014 12:27am

maquiladora wrote: »

Still there.

http://www.metoffice.gov.uk/public/weather/forecast/map/gcpvj0v07#?zoom=6&map=Rainfall&lon=-4.00&lat=51.73&fcTime=1403607600

nice one thanks! new site is a bit unorganized.:D

Strangegravy · 25-06-2014 11:14am

Very sticky and humid out there, some of the clouds look very ominous here in east Limerick, any chance of any sparks, Cape seems quite low too, not that I know much about that.

diceyd · 25-06-2014 11:18am

could someone explain what a cape is please.

Hal1 · 25-06-2014 11:26am

diceyd wrote: »

could someone explain what a cape is please.

A cape is any sleeveless outer garment, such as a poncho, but usually it is a long garment that covers only the back half of the wearer, fastening around the neck ...

:pac:

CAPE is effectively the positive buoyancy of an air parcel and is an indicator of atmospheric instability, which makes it very valuable in predicting severe weather.

Take you're pick!

Red Nissan · 25-06-2014 2:07pm

diceyd wrote: »

could someone explain what a cape is please.

CAPE is a measure instability or potential energy release if suitable weather takes advantage of it.

It's measured in J/kg that's Joules of energy and the higher the number the better the chance of any passing weather will interact with.

And approaching thunderstorm passing over 100 J/kg will probably not fire up, and area needs a minimum of 300/500 J/kg to elicit a response from a passing storm.

A CAPE of 3,000 J/kg will cause a massive reaction to any storm passing its way, that much will produce great lightning and possibly even a Tornado.

Convective/Thunderstorm Discussion: Summer/Autumn/Winter 2014-15

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