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Strong Winds, Heavy Rain Wintry Weather : Sat 2nd to Mon 4th March 2019

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Comments

  • Registered Users Posts: 1,003 ✭✭✭Lucreto


    Each winter I want to walk in falling snow.
    Last night mission accomplished \○/


  • Registered Users Posts: 10,631 ✭✭✭✭Mental Mickey


    Is it safe to drive this morning?


  • Moderators, Home & Garden Moderators, Science, Health & Environment Moderators Posts: 17,619 Mod ✭✭✭✭DOCARCH


    Is it safe to drive this morning?

    Yes.


  • Registered Users Posts: 10,631 ✭✭✭✭Mental Mickey


    DOCARCH wrote: »
    Yes.

    We have to negotiate an icy driveway in our wheelchairs


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


    Dublin has had snow on March 1/2 2015, March 4 2016, March 1-3 2018 and March 3 2019. Bit of a coincidence.

    Correction on saying this probably being the 4th best snow event of the decade here, forgot about 18 March 2018.


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


    Just noticed the thread title says 2018. Funny how I made the same mistake above.


  • Registered Users Posts: 28,567 ✭✭✭✭_Kaiser_


    Have they sorted out the M7 and surrounding areas in North Kildare at this point? I'm looking out the window in Laois and the car is still covered by snow and the driveway pretty thick with it.

    Deciding whether it's worth driving to work (and the inevitable delays more so if it's still bad enough), or work from home today


  • Registered Users Posts: 4,467 ✭✭✭harr


    _Kaiser_ wrote: »
    Have they sorted out the M7 and surrounding areas in North Kildare at this point? I'm looking out the window in Laois and the car is still covered by snow and the driveway pretty thick with it.

    Deciding whether it's worth driving to work (and the inevitable delays more so if it's still bad enough), or work from home today
    Was just chatting to friend who is currently on the M7 and he says it’s crawling, the road isn’t particularly slippery but just volume and people probably being over cautious. He did mention that all back roads in kildare and Laois are bad and it took him the extra half hour to get to motorway.


  • Registered Users Posts: 2,299 ✭✭✭PixelTrawler


    sryanbruen wrote: »
    Dublin has had snow on March 1/2 2015, March 4 2016, March 1-3 2018 and March 3 2019. Bit of a coincidence.

    Correction on saying this probably being the 4th best snow event of the decade here, forgot about 18 March 2018.

    We had a day of heavy snow March 27th 2013 also


  • Registered Users Posts: 18,069 ✭✭✭✭fryup


    this has got to be the result of global warming/climate change??


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


    fryup wrote: »
    this has got to be the result of global warming/climate change??

    We generally try to keep that aspect of discussion out of these type of threads.


  • Registered Users Posts: 7,094 ✭✭✭pad199207


    Drip drip drip


  • Registered Users Posts: 19,540 ✭✭✭✭cnocbui


    smoking-hill-pan.jpg


    Snowset.jpg


    Snow-bush.jpg


  • Moderators, Science, Health & Environment Moderators Posts: 7,144 Mod ✭✭✭✭pistolpetes11


    Well it maybe short lived but the kids got there day out in the snow so everyone is happy in this house in Newbridge


  • Registered Users Posts: 568 ✭✭✭CianDon


    I was up at the Limerick Forest Rally yesterday when the blizzard started. Utter misery standing out for two hours photographing the cars, utter misery taking 55mins to get four miles back to Service to find out the event was cancelled and even more misery having a 65min journey home taking 3.5 Hours.

    47225467952_009fe00187_c.jpg

    47225467892_7951c2516c_c.jpg


  • Registered Users Posts: 48,129 ✭✭✭✭km79


    You had fun at the rally so :D
    Utter misery is right. I think I might post some photos of the last 2 weeks of record breaking February temps to cheer/warm myself up


  • Registered Users Posts: 9,235 ✭✭✭lucernarian


    It does look to be a degree or so colder than progged, but when I talk of snow I mean proper snow, not the wet stuff that seems to be falling. Here down the road from you it's just cold rain at 65 m amsl, with about 10% sleet thrown in there. I can't see any thing of note falling throughout the day but it would be nice if it did. WBTs around the country still too high for me.
    This thing with wet bulb temperatures... There are issues with using it a guide for snow, not least the latent heat of ice sublimination that's not taken into account, and wet bulb temperatures being mostly invariant to changing humidity levels isn't actually useful when you want to incorporate the effects of precipitation and phase changes upon the precipitation as a whole. What I saw yesterday was snow sticking at wbts >0.5 sometimes, but never with dewpoints >0.

    Still, I didn't give yesterday much chance of any widespread snow, much less in low lying parts of Dublin :eek: and reports from Kerry and Cork too, nice event for much of the country


  • Registered Users Posts: 48,129 ✭✭✭✭km79


    Nasty nasty hail shower ongoing in athenry


  • Registered Users Posts: 33,721 ✭✭✭✭RobertKK


    Still bits of snow around here on the hills in Kilkenny.


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    This thing with wet bulb temperatures... There are issues with using it a guide for snow, not least the latent heat of ice sublimination that's not taken into account, and wet bulb temperatures being mostly invariant to changing humidity levels isn't actually useful when you want to incorporate the effects of precipitation and phase changes upon the precipitation as a whole. What I saw yesterday was snow sticking at wbts >0.5 sometimes, but never with dewpoints >0.

    Still, I didn't give yesterday much chance of any widespread snow, much less in low lying parts of Dublin :eek: and reports from Kerry and Cork too, nice event for much of the country

    Sublimation is less critical than melting when it comes to cases like yesterday, where we have a deep near-zero saturated layer from the surface up to mid levels, producing more of a wet snow. This is different to a drier atmosphere, where each snowflake will have a lower liquid-water loading and hence fluffier snow.

    I was looking back at why the model soundings changed so abruptly from 00Z and 06Z to 12Z and it seems to be related to enhanced lift through slightly different upper dynamics, which cooled the whole atmospheric column just enough to knock the wbt through the bottom km or so that little bit to the colder side than had been shown in earlier models. This can be seen by comparing the actual IR satellite imagery to the model simulated IR. I don't think it had anything to do with evaporative cooling as this can't occur when the whole column is near 100% r.h.

    Regarding the actual wbt values reported during snow yesterday, looking at all synop stations that reported snow (Shannon Airport, Casement, Dublin Airport and Mullingar), every one of them had sleet/rain turn to snow only when the wbt was around 0.5 °C or lower. See all hourly reports below (click on each station). The wbt is around half way between the dry-bulb temperature (T) and dewpoint (Td). Present weather is the WW column. Dewpoints can be just a few tenths above 0.0 if the dbt is sufficiently low (<1.0).

    http://www.ogimet.com/cgi-bin/gsynres?lang=en&state=Irel&osum=no&fmt=html&ord=REV&ano=2019&mes=03&day=04&hora=12&ndays=1&Send=send


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  • Closed Accounts Posts: 4,431 ✭✭✭Mortelaro


    Quite a bit of disquiet on the radio news programmes today about the lack of information about potential disruption
    No info on the large motorway signs for example
    That's simply because met Éireann gave forecasts that lead everyone to expect mostly rain
    So roads filled up with drivers unused to the conditions
    I'd imagine nothing was gritted either for the same reason
    It was a fail but an understandable one where mother nature trumped science


  • Registered Users Posts: 226 ✭✭mobil 222


    CianDon wrote: »
    I was up at the Limerick Forest Rally yesterday when the blizzard started. Utter misery standing out for two hours photographing the cars, utter misery taking 55mins to get four miles back to Service to find out the event was cancelled and even more misery having a 65min journey home taking 3.5 Hours.

    47225467952_009fe00187_c.jpg

    47225467892_7951c2516c_c.jpg

    Well thanks for the Photos They are very good and a credit to ya.
    Did they get ' Baby Blue Frank Kelly' out of the drain
    #Limerick Forestry Rally.


  • Registered Users Posts: 12,048 ✭✭✭✭Grandeeod


    Mortelaro wrote: »
    Quite a bit of disquiet on the radio news programmes today about the lack of information about potential disruption
    No info on the large motorway signs for example
    That's simply because met Éireann gave forecasts that lead everyone to expect mostly rain
    So roads filled up with drivers unused to the conditions
    I'd imagine nothing was gritted either for the same reason
    It was a fail but an understandable one where mother nature trumped science

    That sums it up. Thankfully it was a Sunday and not a Monday to Friday event. That would have been real chaos.

    This is the view from the Laois Ski resort yesterday afternoon.:D

    Piste.jpg


  • Registered Users Posts: 23,370 ✭✭✭✭Kermit.de.frog


    Worth keeping an eye on Tuesday evening and overnight. Again there could be some snow with that system on the western flank so the midlands/north midlands could be most at risk of a few cms from that.


  • Registered Users Posts: 48,129 ✭✭✭✭km79


    Fairly sure I seen a few flashes of lightening west of athenry
    Yep
    Just heard thunder


  • Registered Users Posts: 2,827 ✭✭✭madmaggie


    Mortelaro wrote: »
    Quite a bit of disquiet on the radio news programmes today about the lack of information about potential disruption
    No info on the large motorway signs for example
    That's simply because met Éireann gave forecasts that lead everyone to expect mostly rain
    So roads filled up with drivers unused to the conditions
    I'd imagine nothing was gritted either for the same reason
    It was a fail but an understandable one where mother nature trumped science

    Snow was shown over Ireland for Sunday on the BBC forecast on either Thursday or Friday. I was waiting for Met Eireann to mention it.


  • Registered Users Posts: 6,098 ✭✭✭highdef


    madmaggie wrote: »
    Snow was shown over Ireland for Sunday on the BBC forecast on either Thursday or Friday. I was waiting for Met Eireann to mention it.
    ECM and Arpege also forecasted the snow, as well as the UK Met Office. I mentioned the snow as a risk fairly early on in this thread based on the cross model agreement of what are often three agencies with good track records, especially when it comes to snow forecasting.


  • Registered Users Posts: 15,944 ✭✭✭✭Villain


    Villain wrote: »
    A dirty day ahead tomorrow, thankful the worst will stay out NorthWest, Sunday looks more interesting now, a surprise bit of white stuff maybe?

    I think many people are missing what the models were showing days out, my quoted post above was on page one of this thread from Friday morning after looking at the weather models and the HARMONIE charts I saw Saturday supported that too.

    The detail did suggest higher ground for most of it but 2pm Sunday it was very obvious from the reports coming from Kerry it wasn't going to be a high ground only event.


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Sunday morning the Harmonie meteogram for Celbridge was showing rain, turning to sleet for a couple of hours in the afternoon. No snow.


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  • Registered Users Posts: 3,131 ✭✭✭Rebelbrowser


    Villain wrote: »
    I think many people are missing what the models were showing days out, my quoted post above was on page one of this thread from Friday morning after looking at the weather models and the HARMONIE charts I saw Saturday supported that too.

    The detail did suggest higher ground for most of it but 2pm Sunday it was very obvious from the reports coming from Kerry it wasn't going to be a high ground only event.

    I do think your last line is key. Models are just producing forecasts. Nothing like actual reported data. We really should pay more here to initial reports on here. On Sunday those initial reports showed lower temps than expected. That was crucial. So often for forecasted snow and wind events we see the opposite of that behaviour too (i.e. disapointing initial reports of higher than expected temps, lower wind, etc) and we ignore them because we prefer the forecasted outcome. Next time I'm going to trust more in what is happening outside our windows!


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