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Convective/Thunderstorm Discussion : 2019 and Winter 2020

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  • Registered Users Posts: 6,103 ✭✭✭highdef


    A line of very heavy precipitation had developed in the past half hour, stretching from just south of portlaoise northeastwards to Balbriggan and out to the Irish sea. Recent sferic in North Kildare.


  • Registered Users Posts: 7,095 ✭✭✭pad199207


    Thunder here in kildare


  • Registered Users Posts: 360 ✭✭Weather BOFH


    Torrential hail here near the Hill of Allen with 4 or 5 rumbles of thunder.


  • Registered Users Posts: 8,913 ✭✭✭Danno




  • Registered Users Posts: 7,095 ✭✭✭pad199207


    Stunning shelf cloud just went over here in Naas

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  • Registered Users Posts: 6,466 ✭✭✭jimmynokia


    pad199207 wrote: »
    Stunning shelf cloud just went over here in Naas

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    Nice pic getting dark here in DN22 lets hope for some action might head out for a look with the camera


  • Registered Users Posts: 6,466 ✭✭✭jimmynokia


    Just got into Car heard rumble


  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Tomorrow could be a fairly lively day with scattered thunderstorms and squally hail showers with a fair amount of instability in the atmosphere. Cold uppers with plenty of moisture and sunny internals, good low level shear but not so good deep level sheer , good lapse rates . Thunderstorms could occur anywhere but thinking the midlands / East could see a shot of them in the afternoon perhaps. Any other thoughts ?


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  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Big convective gusts from those squally showers tomorrow.


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  • Moderators, Home & Garden Moderators, Science, Health & Environment Moderators Posts: 17,620 Mod ✭✭✭✭DOCARCH


    Distant rumble in Dublin 16.


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  • Registered Users Posts: 366 ✭✭kittyn


    DOCARCH wrote: »
    Distant rumble in Dublin 16.

    Damn I missed it 🙈


  • Closed Accounts Posts: 3,502 ✭✭✭ Everleigh Limited Bowler


    Meath coast a little earlier.


  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Convective Weather


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    Day 2 Convective Outlook
    VALID 06:00 UTC Tue 02 Apr 2019 - 05:59 UTC Wed 03 Apr 2019

    ISSUED 20:25 UTC Mon 01 Apr 2019

    ISSUED BY: Dan

    Elevated showers may be ongoing across coastal parts of East Anglia and Kent at the beginning of this forecast period, posing a low risk of lighting. These will soon clear, and thereafter the attention turns to the post-frontal environment already over Ireland and western Scotland, and extending across the remainder of the British Isles through Tuesday.


    A potent upper trough will extend southwards across the British Isles, with notably cold mid/upper levels creating very steep lapse rates and a few hundred J/kg CAPE. Numerous wintry showers will develop, both in response to relatively warm SSTs and diurnal heating inland. The strongest cells may produce a few lightning strikes and some small hail.

    Beneath the trough axis, shear will tend to be weak due to both similar speed and direction with height. However, around the periphery stronger shear will be present, particularly across southern and western Ireland and also E/SE England. Tricky attempting to be more specific to areas with a greater lightning potential given the extensive nature of somewhat marginal instability, but perhaps the best overlap of favourable conditions will exist in S + E Ireland and across the Celtic Sea towards SW England - these areas may require an upgrade to a low-end SLGT if confidence improves.

    Showers inland will tend to become more isolated overnight as nocturnal cooling of the boundary layer commences, but some will likely persist aided by both upper forcing and relatively warm seas around western coasts.


  • Registered Users Posts: 13,477 ✭✭✭✭sryanbruen


    Did get quite dark yesterday evening. The odd rumble of thunder.

    https://twitter.com/photographywx/status/1112970646143762432?s=21


  • Registered Users Posts: 6,466 ✭✭✭jimmynokia


    Over the Dublin mountains..


  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Cork and Limerick had a fair few sferics detected today.

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  • Registered Users Posts: 6,466 ✭✭✭jimmynokia


    jimmynokia wrote: »
    Over the Dublin mountains..

    Another one I got today, some epic cloud formations out there today

    https://www.boards.ie/vbulletin/showpost.php?p=109834357&postcount=65


  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Quite a few sferics showing up a while in Kerry tonight. Big squally showers of hail still going through here near Tralee. Still a chance of some thunder overnight .


    IMO Thurs a lot of CAPE available with diurnal heating , low level shear and cold uppers. Not much DLS but lapse rates steep. Less wind on Thurs coming from a NE /E direction with slow moving cloud perhaps giving more of a chance for cells to form. These could produce some heavy localised downpours with hail also perhaps and am wondering if a few places could experience a proper thunderstorm overhead for a time.

    Just trying to build a picture from the charts to better understand and for me personally hopefully to be better able to anticipate when the conditions are more favourable for thunderstorm development.

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  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Watching out for thunderstorms tomorrow . Will see what happens.


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  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Nice sunny day in Tralee, dry so far but huge convection going up, wonder will it spark ?


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  • Registered Users Posts: 18,078 ✭✭✭✭JCX BXC


    Some beautiful convection around Galway with a few hail showers.

    Scene from NUIG just now :

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  • Registered Users Posts: 149 ✭✭Gary Owen


    Couple of claps of thunder here in Limerick now .


  • Registered Users Posts: 419 ✭✭Tacklebox


    Thunder near minister's cross, Sixmilebridge area now, very loud


  • Registered Users Posts: 18,078 ✭✭✭✭JCX BXC


    Shannon Airport reporting light thunderstorm hail (-TRGR), temperature 4°c dewpoint 0°c




  • JCX BXC wrote: »
    Shannon Airport reporting light thunderstorm hail (-TRGR), temperature 4°c dewpoint 0°c

    Vicious thunderstorm just passed through Ennis with hailstones up to 1cm & frequent lightning. Surface a carpet of white.


  • Registered Users Posts: 4,668 ✭✭✭SleetAndSnow


    high topped clouds in Cork, Just had a hail shower aswell. Light but very big stones. Sleeting now


  • Registered Users Posts: 3,031 ✭✭✭redsteveireland


    Lightning overhead and large teardrop shaped graupel in Monivea in the last 20minutes, heading towards the east of Galway city.


  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Todays crop of detected sferics , clouds matured and became weakly electrified as they crossed the country in clearer less messy air aided by the bit of diurnal heating it would seem.

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  • Registered Users Posts: 3,031 ✭✭✭redsteveireland


    Todays crop of detected sferics , clouds matured and became weakly electrified as they crossed the country in clearer less messy air aided by the bit of diurnal heating it would seem.

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    Some missing from Galway and Clare on that. How many detectors do we actually have?


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  • Moderators, Science, Health & Environment Moderators Posts: 11,762 Mod ✭✭✭✭Meteorite58


    Yeah the Met office is showing more including Galway but they dont pick them all up , I believe they might miss around a third of sferics from lightning discharges. Often notice when reports come in that they might not show up on the radar or not as intense as being reported.


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