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Convection /Thunderstorm discussion Spring /Summer 2026

11718202223

Comments

  • Registered Users, Registered Users 2 Posts: 7,324 ✭✭✭CrowdedHouse


    Are these thunderstorms?

    Seven Worlds will Collide



  • Registered Users, Registered Users 2 Posts: 7,579 ✭✭✭pad199207




  • Registered Users, Registered Users 2 Posts: 319 ✭✭chris2007


    Screenshot_20260619_160002_Met ireann.jpg

    Possible thunderstorm later in parts of leinster this evening



  • Registered Users, Registered Users 2 Posts: 2,390 ✭✭✭squarecircles


    Untitled Image Untitled Image

    Never seen cape like this over ireland,



  • Registered Users, Registered Users 2 Posts: 552 ✭✭✭Donegal Ken


    A few weeks ago that warm spell at the end of May charts where showing similar cape values

    2026-05-27T18_00_00Z (2).jpeg xx_model-en-324-0_modez_2026051812_222_949_654.png

    Having that much cape does not always mean thunderstorms,Cape is only fuel or potential energy available in the atmosphere



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  • Registered Users, Registered Users 2 Posts: 668 ✭✭✭Ros4Sam24


    Early days yet but some lovely thundery charts appearing as a low meets some very warm air.

    IMG_1627.jpeg IMG_1628.jpeg

    We desperately missed the trigger last month, with the Uk stealing all the storms. Hopefully we’ll get some action this time but early days yet…



  • Registered Users, Registered Users 2 Posts: 2,520 ✭✭✭MrFrisp




  • Registered Users, Registered Users 2 Posts: 4,145 ✭✭✭pureza


    The date is on the chart above and time stamp

    It’s on every chart here

    It’s still outside the normal reliable time frame so does depend on the direction strength and track of a low pressure system in the mid Atlantic



  • Registered Users, Registered Users 2 Posts: 2,520 ✭✭✭MrFrisp




  • Registered Users, Registered Users 2 Posts: 442 ✭✭Condor24


    Potential is there but we're days away from making more accurate predictions on storms. Could be on a knife edge up to the day of it. There's July 1985 potential there. But we've seen it melt away so many times before,we have to get the right conditions in place.



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  • Moderators, Science, Health & Environment Moderators Posts: 13,565 Mod ✭✭✭✭Meteorite58


    Looking forward to seeing what the week brings us with all that heat and high Dp's available, especially the end of the week when LP sets up nearby and probably sending moisture in over parts of the island in one form or another, could get up to the high 20's by thurs or even 30'C or so. Has the look of a few big storms perhaps maybe Thurs or Fri, scraping the SE on Mon ? MUCAPE off the scale but need a source of moisture. Close eye on the charts ⚡️⚡️

    modez_20260620_2100_animation.gif


  • Registered Users, Registered Users 2 Posts: 57 ✭✭leprechauntimmer123


    Didn't think someone would already say it but next week has potentially one of the higher ceilings for anybody in the country in a bit for thunderstorms, lightning AND IF charts remain this way, we're also looking at potential for severe storms. We also have a bit of degree for low level shear but I am not gonna call on the potential for tornadic activity yet because i am highly reluctanteeven as a weather enthusiast with a country like ours when forecasts can flip on a blink. It's easier to do forecasting for America but given that this is within the range of 120 hours out, i dare say that this can hold. The thing about this period is the fuel is there but do models increase the opportunity stuff actually fires. Also, noting yeah this could be similar to July 1985 in terms of a ceiling here. I'm eager as a Dubliner here, this also has a big ceiling for us which is unusual. Let's see.



  • Registered Users, Registered Users 2 Posts: 661 ✭✭✭Thunder87


    Yep, about as good a Spanish plume setup as you could hope for on this mornings charts, though given how often thunderstorm forecasts are a bust its obviously far too early to call with any confidence yet

    image.png


  • Registered Users, Registered Users 2 Posts: 57 ✭✭leprechauntimmer123


    Models aren't letting down on the degree of instability. Honestly my only concern at this point is actually firing storms

    That cut off low gives us some strong windfields to deal with. Anomalous setups do highly anomalous things and I'm not sure I can't recall a parameter space that would be capable of all severe hazards like wind, hail and tornadoes like this one. The best analog for a svr parameter space is probably July 1985 but in terms for tornadoes, i have no mental analogs at all. For the record to back up my thoughts about tornadoes here, here's a sounding from Cavan.

    gfs_2026062106_108_53.75--7.50.png

    Strong low level curvature in the hodographs, large amounts of instability combined with strong deep layer shear of 40-50 kts. There will be a strong 700 mb shortwave filling in with the potential for convection. Watch this setup closely, it's not your average plume setup because we have shear at the low levels and upper levels here.



  • Registered Users, Registered Users 2 Posts: 661 ✭✭✭Thunder87


    The usual problem with these events is models often underplay how easily the Atlantic encroaches on us, so closer to the time everything gets shunted eastward and as usual it's southern England, France and Benelux get all the fun. I remember one event probably 15 years ago now where there was huge excitement on here but in the end all we got was a single storm clipping Rosslare with some supercells in the UK

    But interesting charts for sure



  • Registered Users, Registered Users 2 Posts: 57 ✭✭leprechauntimmer123


    Yeah, that is the thing. But models haven't let up on this so if shifts do occur, i hope it's very little. Models have near 4k SBCAPE in the east which is just absurd. This is a bit of a odd occasion where bothwareas aren't left out

    The UK gets their share of the plume and we do too. Could be a very active day. I'm looking forward to how the news is going to present this one, maybe the odd rumble or two LOL.



  • Registered Users, Registered Users 2, Paid Member Posts: 14,693 ✭✭✭✭sryanbruen


    Photography site - https://sryanbruenphoto.com/



  • Registered Users, Registered Users 2 Posts: 661 ✭✭✭Thunder87


    That's the one! The stuff over Ulster looks decent on that chart but from memory it was just our usual single cell stuff, the one in the Irish Sea and the storms over the UK were proper MCS storms, there was a tornado in Leicester from what I remember



  • Registered Users, Registered Users 2 Posts: 57 ✭✭leprechauntimmer123


    Latest GFS runs uptrends MUCAPE over Dublin to around 3k. Also worth noting there is a very conditional possibility that the east gets a early show late Wednesday night with 2k MUCAPE too around the area. We will see. This could be a very active period.



  • Registered Users, Registered Users 2 Posts: 552 ✭✭✭Donegal Ken


    xx_model-en-324-0-zz_modez_2026062112_99_949_654.png xx_model-en-324-0-zz_modez_2026062112_99_4879_654.png

    That's the hugest cape value I have seen modelled for Ireland on the Ecmwf 6000+ parameters look very good for severe weather and Thunderstorms later Thursday especially across the west, northwest and north



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  • Moderators, Science, Health & Environment Moderators Posts: 13,565 Mod ✭✭✭✭Meteorite58


    A trough in the vicinity of the the SE tomorrow with high theta E advecting towards the SE through the Celtic sea, mainly off shore over towards the Bristol Channel /Wales where it looks very unstable but it might produce convection /thunderstorms in the far SE in the afternoon. Lots of LLS and DLS available and converging winds and should get up around 22 -23C there with DP's in the high teens. Will see.

    FSXX00T_36.gif

    xx_model-en-324-0_modez_2026062112_27_949_1234.png modez_20260622_1000_animation.gif


  • Registered Users, Registered Users 2 Posts: 6,296 ✭✭✭Storm 10


    Any chance of sparks in the West during the week



  • Moderators, Science, Health & Environment Moderators Posts: 13,565 Mod ✭✭✭✭Meteorite58


    Fairly high chance Thurs and Fri.

    Thurs if the parameters line up then a chance of some big storms. The W /NW /N would be in a prime position with the area of LP possibly sending in bands of showers and very moisture rich airmass which could really explode with all that heat available, DP's in the low to mid 20's. Could get some very defined areas of convergence and vorticity playing a role, could see some big cells .

    Fri temps could get up to the low 20'S with DP's in the high teens so very humid and again looks like plenty of moisture available and possibly unstable at that.

    Nothing definite , will depend a lot on the position of the LP and what in the way of fronts /troughs that it might produce close to or over us, all the heat and CAPE in the world is no good unless we have moisture, but would think there is a fairly good chance for the hot weather to go out with a bang !

    The charts below are just an example for a guidance of what it could look like but is bound to change over the coming days.

    xx_model-en-324-0_modez_2026062112_99_1642_149.png

    xx_model-en-324-0_modez_2026062112_99_1642_352.png

    xx_model-en-324-0_modez_2026062112_105_1642_352.png xx_model-en-324-0_modez_2026062112_105_949_352.png


  • Registered Users, Registered Users 2 Posts: 6,296 ✭✭✭Storm 10


    Thanks for that Meteorite58 great detail as usual



  • Registered Users, Registered Users 2 Posts: 13,205 ✭✭✭✭Say my name


    It's dropping rain already now in county wexford. Only lasted a few minutes before it pushed off. So this is morning and whatever in the afternoon.



  • Registered Users, Registered Users 2 Posts: 6,757 ✭✭✭highdef


    A couple of potent little cells have just popped up in east Laois and are heading over the border to Kildare now, in the vicinity of Athy. Heading north east



  • Registered Users, Registered Users 2 Posts: 6,757 ✭✭✭highdef


    Some very heavy convective showers in the Dublin city area now. I'd say a fair few people on lunchtime walks have been caught out unaware.

    image.png


  • Registered Users, Registered Users 2 Posts: 57 ✭✭leprechauntimmer123


    met eireann meteorologist was just i the newsmmentioning Thursday for the highest thunderstorm risk in the NW but charts suggest anywhere will really have a opportunity iif cells can form amidst the elevated plume with potential large hail risk.



  • Registered Users, Registered Users 2 Posts: 207 ✭✭bauney


    I asked this on another forum but no takers so hoping someone can enlighten me here.

    Yesterday we were athletics in Tullamore where the weather was very hot and calm, then some cloud cover would come and make things more comfortable again.

    During the hot phase the it suddenly got very windy (totally out of place of the form all day) for 20/30 seconds to which a persons baseball hat was taken and flew up in the air (30/40 meters). Its stayed high and continue for about 100m before dropping. Then the wind calmed down and back to blistering heat.

    Was this some wind devil? A first occurrence for me at least



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  • Registered Users, Registered Users 2 Posts: 119 ✭✭paulhac


    commonly called dust devil , saw one in 1995 during the blistering summer.

    They usually form on heated flat ground during high temperature periods.

    They can be seen when dust and the likes get drawn up into air. They form from the ground upwards unlike tornadoes.



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