Convective/Thunderstorm Discussion: Autumn2022

Storm 10

Looks like there could be some action around the West North Coast tonight going by the latest radar lightning off the Northwest

Storm 10

Flashes of lightning West of Galway

Storm 10

Thunder and lightning Moycullen

Danno

Seen three flashes west of here - south Laois.

vickers209

A level 1 was issued across the western British Isles for wind gusts and additionally a marginal tornado threat.

squonk

Lightening to my west. Probably coming to pass over me shortly here in north Clare

Storm 10

Thunder lightning Galway city

squonk

Got it wrong. The Saturn send to have been heading NEward. Headed in over Galway bay but it’s petered out now. Fine very blustery here though.

spookwoman

Look like West Kerry / Cork getting some action now.

Brief but torrential downpour, saw 3/4 flashes with decent rumbling Galway City.

Meteorite58

Active storm running along the Cork coast.

Colder uppers well and truly over us now aiding plenty of instability along with plenty of LLS and DLS giving strong Lapse Rates and a big addition to the instability coming from the seas being relatively warm still. Big convective blustery showers streaming inland, looks very active along Atlantic coasts tomorrow from early, will see how much thunderstorm activity moves inland, could be fairly active as the trough or maybe more than one trough moves across the country during the day. could well see thunderstorms over the Irish sea also tomorrow.

The frontal system moving up over Ireland on Sunday could be fairly active also, will see.

sunbabe08

Thunder and lightening down here in youghal!!! Woke me up. Some nice rolling thunder

spookwoman

Thunder in Waterford city now. Flash of lightning as well

sudocremegg

Waterford getting some nice bangs, fairly spaced apart though. Definitely warmer tonight.

spookwoman

Sparks have died but wind has really picked up.

sudocremegg

https://www.boards.ie/discussion/comment/119747030#Comment_119747030

Absolutely torrential rain in the city just now, lasted a couple minutes.

spookwoman

Managed to get car in position where camera was facing lightning direction and out of the rain. Sods law lightning stop as i get set. Car is shaking here badly

bad2thebone

Few rumbles and sparks in North Clare this morning. Quite long rumbles too.

Gremlinertia

Some sort of sheet lightning and rumbles Galway city east

Pa ElGrande

Thunder claps + torrential rain + severe gusts

West Limerick 200 M ASL

Hearing big rumbles coming from Spiddal direction. 20km as the drone flies.

Rattled the house a bit.

One a minute or so lights just went for a second

Storm 10

Serious loud thunder in Galway City now

zell12

https://www.boards.ie/discussion/comment/119747334#Comment_119747334

And a quick heavy hailstorm!

Storm 10

First time I heard a lightning crack it was so close

Gremlinertia

Astonishing thunder in Galway, even the almost totally deaf dog noticed

redsteveireland

Looks like it might just miss me for a change.

Actually hail just arrived.

Pictures or videos, or it didn't happen 😉

Graces7

I did not hear it last night but some intermittent spectacular flashes and crashes since early morning, Seems to have passed now

West Mayo offshore

Storm 10

More flashes to the West of Galway sky is pitch black

zell12

More..

squarecircles

SEVERE THUNDERSTORM WATCH - SATURDAY 15TH OCTOBER 2022

Issued 2022-10-15 08:28:59

Valid: 15/10/2022 0600 - 16/10/2022 0600

Forecast Details

Upper trough over the NE Atlantic will continuing amplifying south close to the UK, a vigorous upper vortex embedded in the upper trough and collocated surface low to the west of Ireland will move NE towards western Scotland through the day, moving close to N. Ireland.

An occluded front is bringing an area of rain eastwards across northern and western areas this morning, tapering to narrowing band in its southern extent. Following the rain clearing east, lapse rates will quickly steepen from the west across northern and western areas, as cold air aloft associated with Atlantic upper trough, characterised by 500mb temps of -25 to -30C, edges in atop of moist maritime SWly flow warmed by seasonally warm SSTs. The steep lapse rates and increasing lift with arrival of upper vortex, west of Ireland at breakfast time, will support heavy showers and thunderstorms, initially across western Ireland, to spread east across the island of Ireland and in across Wales, NW England and western Scotland through the day.

A strong southwesterly jet stream will cover southern Britain through today, which combined with backing surface winds ahead of low moving NE over Ireland, will create strong deep layer shear. The strong deep layer shear will overlap the southern extent of strongest instability across S Ireland, Wales and NW England – where MUCAPE, boosted by warm SSTs beneath cold air aloft, is forecast to reach 600-900 j/kg. The strong shear / strong instability suggests organised areas of convection forming – perhaps some bowing line segments, capable of producing damaging convective wind gusts of 50-60 mph, hail and C-G lightning. Also, convective allowing models indicate strong low-level shear ahead of low moving NE and associated wrap-around occlusion moving east, so more buoyant / strong updrafts into organised convection could rotate to form a tornado or two, particularly coastal areas in the west. Therefore, have issued a risk of severe weather for S Ireland, Wales and NW England – where vertical shear looks strongest.

Issued by: Nick Finnis