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Thursday/Friday: Lightning Storms, Flash Flooding Event Thread

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    #152
    Little snowy old me
    Registered Users Posts: 420 ✭✭Little snowy old me


    nacho libre wrote: »
    This is unusual, you usually are very optimistic. In these situations thunderstorms can occur in places that they aren't necessarily forecasted to. Also with the east forecast to be sunny, with quite warm and humid conditions into this evening, this heating may well storm development later on. It maybe the case that you miss out on seeing lightning in your area, but i'd be confident you'll at least see some in the distance night sky.

    Thanks nacho, that gives me a bit of hope for later so. Its certainly 'muggy' enough for activity later so we will see how things go.


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    #153
    Mortelaro
    Closed Accounts Posts: 4,431 ✭✭✭Mortelaro


    IvySlayer wrote: »
    Anyone remember 2003 I think in October? Lightning/thunder started from morning and lasted well into the night.

    Yes that was in September
    It was fierce here in Arklow but I was at a wedding in Brittany where it was something to behold altogether :D
    Same system causing the storms as in Ireland
    Started at home around 5 and went on untill the small hours
    In Brittany it was just constant forks with the bangs at the same time
    Power was off but ya wouldn't have needed lights


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    #154
    Musefan
    Registered Users Posts: 774 ✭✭✭Musefan


    A dead heat in Cavan with an occasional light breeze. The sky is very hazy, the kind where you're not sure if you're looking up at cloud cover or sky!


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    #155
    US2
    Registered Users Posts: 2,651 ✭✭✭US2


    Why will there be minimal thunder or rain with this lightning, or why do do we usually get thunder and rain with lightning


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    #156
    Gaoth Laidir
    Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    US2 wrote: »
    Why will there be minimal thunder or rain with this lightning, or why do do we usually get thunder and rain with lightning

    If we do manage to get some surface-based storms (formed by the land heating up to the required temperature) then we will see rain from this, but the inaudible thunder and no rain applies to elevated storms, i.e. not formed directly by hot air rising from the ground but from some level up high. With these storms the lightning occurs much higher up (i.e. further away) and the thunder gets ducted away from us as it passes down through the warmer layers of the atmosphere (like a reverse mirage). The rain can evaporate as it falls the long distance through the dry low layers to the ground.

    A few small cumulus fractus are now forming over the Wicklow mountains.


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    #157
    Mortelaro
    Closed Accounts Posts: 4,431 ✭✭✭Mortelaro


    US2 wrote: »
    Why will there be minimal thunder or rain with this lightning, or why do do we usually get thunder and rain with lightning

    The lightning will be up at 20 to 30000 ft so even if overhead it will be up to 10 kms away and cloud to cloud adding to its muffling
    You will hear it but it will be distant
    The lightning will be lower if it's raining nearby or at your location
    Gunshots then


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    #158
    highdef
    Registered Users Posts: 6,152 ✭✭✭highdef


    The cloud base will be very high so the thunder created by cloud to cloud lightning (usually the more common type versus cloud to ground) has a long way to travel. Also, if it's a night time storm the lightning can often appear to be quite close when in fact it's many kilometres away, often so far away that the sound of the thunder does not reach you.

    Rain wise, with high based storms the rain sometimes evaporates before it reaches the ground.

    You beat me to it, Mortelaro!!!


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    #159
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    Kermit.de.frog wrote: »
    Some models, in fact most now delay storms with heavy rainfall to the early hours of the morning in the east but storms with little or no rainfall prior. This is not actually that unusual with a plume like this - you can have lightning flashing all round and literally no rain reaching the surface. The lightning would be particularly high in elevation but still packs a visual punch.

    It's disconcerting at first but it's quite a show all the same.

    The last example I can think of was some time in the late 90's but I can't remember the year because I was too young - maybe 97 something like this occurred in Dublin.

    If anyone remembers let us know. It was spectacular and very memorable.

    You were only a tadpole.


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    #160
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    Kermit.de.frog wrote: »
    Maybe i'm way out on the year. The lightning was relentless - never seen anything like it before prior but very little rainfall.

    Definitely something you'd remember.

    Around 24/25 August 2000.


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    #161
    Kermit.de.frog
    Registered Users Posts: 23,499 ✭✭✭✭Kermit.de.frog


    Seven Septs wrote: »
    Around 24/25 August 2000.

    I'm thinking maybe I am way out on the year.

    There is no way a lot of people in Dublin don't remember that.

    I'll take it as 2000, Cheers :cool:


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    #162
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    IvySlayer wrote: »
    Anyone remember 2003 I think in October? Lightning/thunder started from morning and lasted well into the night.

    Remember well. The ground white with hail in Dublin. Looked like a snowfall. Mid October 2003.


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    #163
    Kermit.de.frog
    Registered Users Posts: 23,499 ✭✭✭✭Kermit.de.frog


    Seven Septs wrote: »
    Remember well. The ground white with hail in Dublin. Looked like a snowfall. Mid October 2003.

    It lasted 3 days! :D

    Spectacular event by any standard.


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    #164
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    Mortelaro wrote: »
    Yes that was in September
    It was fierce here in Arklow but I was at a wedding in Brittany where it was something to behold altogether :D
    Same system causing the storms as in Ireland
    Started at home around 5 and went on untill the small hours
    In Brittany it was just constant forks with the bangs at the same time
    Power was off but ya wouldn't have needed lights

    It was October. Go to October 2003 in the archive Met Statements and there's a great pic of Dublin.

    https://www.met.ie/climate/past-weather-statements

    Mid September had a heatwave in the mid 20s.


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    #165
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    Kermit.de.frog wrote: »
    I'm thinking maybe I am way out on the year.

    There is no way a lot of people in Dublin don't remember that.

    I'll take it as 2000, Cheers :cool:

    For a write up again go to the archive for August 2000 on the Met site.

    https://www.met.ie/climate/past-weather-statements


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    #166
    sryanbruen
    Registered Users Posts: 13,523 ✭✭✭✭sryanbruen


    Seven Septs wrote: »
    Around 24/25 August 2000.

    For a month as thundery as August 2000, it gets very little mention unfortunately.

    A good section on it from the monthly bulletin:

    u0Eb7Ch.png

    Photography site - https://www.sryanbruenphoto.com/

    Weather photo portfolio - https://sryanbruen.myportfolio.com/weather-1



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    #167
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    Kermit.de.frog wrote: »
    It lasted 3 days! :D

    Spectacular event by any standard.

    That was a great weather year.

    From around 10th March a lovely dry warm spell. It carried into April with temps 21/22C mid April for Easter.

    Some hot weather mid to late June. August heatwave and very dry. 1.6mm recorded in old Kilkenny station for the month i think.

    Mid September heatwave and warm overall. October lightning and hail in the east mid October.


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    #168
    pad199207
    Registered Users Posts: 7,121 ✭✭✭pad199207


    24.5°c with a Dewpoint of 20°c in Kildare


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    #169
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    pad199207 wrote: »
    24.5°c with a Dewpoint of 20°c in Kildare

    I thought the Met Station temps were a bit low to reach 27/28C. You only need another 2.5C to reach 27, very doable.


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    #170
    Mortelaro
    Closed Accounts Posts: 4,431 ✭✭✭Mortelaro


    Seven Septs wrote: »
    It was October. Go to October 2003 in the archive Met Statements and there's a great pic of Dublin.

    https://www.met.ie/climate/past-weather-statements

    Mid September had a heatwave in the mid 20s.

    The one I'm recalling was in 04 I think
    Yeah the October one brought snow to Lugnaquilla


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    #171
    Larbre34
    Registered Users Posts: 23,838 ✭✭✭✭Larbre34


    Chrisht but its heavy.


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    #172
    Mortelaro
    Closed Accounts Posts: 4,431 ✭✭✭Mortelaro


    Seven Septs wrote: »
    I thought the Met Station temps were a bit low to reach 27/28C. You only need another 2.5C to reach 27, very doable.

    A lot of the wow stations in leinster are at 24 or 25c atm


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    #173
    Seven Septs
    Closed Accounts Posts: 145 ✭✭Seven Septs


    Mortelaro wrote: »
    A lot of the wow stations in leinster are at 24 or 25c atm

    They seem to have shot up in the last hour. I was going by Met Eireann site where 22C was the max at their official stations at 12pm.


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    #174
    JCX BXC
    Registered Users Posts: 18,114 ✭✭✭✭JCX BXC


    Jaysus lads, who gives a ****e what happened back in 19-- whatever, there's potential this evening! That's what most of us here want to discuss I'd imagine!


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    #175
    Gaoth Laidir
    Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Selected 1 pm official temperatures/dewpoints.

    Custume Barracks (Athlone) 23/16
    Mount Dillon 23/15
    Dunsany 22/18
    Casement, Moore Park 22/17
    Mullingar, Athenry 22/16
    Gurteen 22/15
    Waterford Airport 21/17
    Dublin Airport 21/16
    Johnstown Castle 20/15

    Oak Park is not reporting.


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    #176
    Gaoth Laidir
    Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    JCX BXC wrote: »
    Jaysus lads, who gives a ****e what happened back in 19-- whatever, there's potential this evening! That's what most of us here want to discuss I'd imagine!

    If you'd lived through July 1985 you'd know...;)


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    #177
    Larbre34
    Registered Users Posts: 23,838 ✭✭✭✭Larbre34


    Radar showing system making contact with Wexford


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    #178
    JCX BXC
    Registered Users Posts: 18,114 ✭✭✭✭JCX BXC


    Fairly hefty showers building off the north coast, strikes showing too.


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    #179
    pad199207
    Registered Users Posts: 7,121 ✭✭✭pad199207


    JCX BXC wrote: »
    Fairly hefty showers building off the north coast, strikes showing too.

    All for the fishes unfortunately.


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    #180
    typhoony
    Registered Users Posts: 1,490 ✭✭✭typhoony


    I'm going with a East Coast event mainly but inland to possibly 150kms


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    #181
    Ninthlife
    Registered Users Posts: 2,243 ✭✭✭Ninthlife


    Whats the best app/site for seeing where this is developing etc.

    Kerp in mind im a total novice so nothing too complicated


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