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Competition: Predict lying snow cm at ME stations 10 Dec and 11 Dec

  • 09-12-2017 11:21am
    #1
    Registered Users Posts: 830 ✭✭✭ Neddyusa


    Just for a bit of fun! ;-)

    Plenty of great amateur forecasters on here.
    Great opportunity to nail your colours to the mast by predicting lying snow depths for tomorrow/Monday.

    I'd suggest Sun morning 10 Dec and Mon morning 11th measurements for a Met Eireann Station.

    I'm going for:
    Sun: Mt Dillon 18cm
    Mon: Gurteen 22cm


Comments

  • Closed Accounts Posts: 18,277 ✭✭✭✭ Eloise Damp Self-improvement


    Neddyusa wrote: »
    Just for a bit of fun! ;-)

    Plenty of great amateur forecasters on here.
    Great opportunity to nail your colours to the mast by predicting lying snow depths for tomorrow/Monday.

    I'd suggest Sun morning 10 Dec and Mon morning 11th measurements for a Met Eireann Station.

    I'm going for:
    Sun: Mt Dillon 18cm
    Mon: Gurteen 22cm
    Think about the children...and the people who will be flooded if your right.......you just don't care!!!!! ;)


  • Registered Users Posts: 6,411 ✭✭✭ CrowdedHouse


    Who measures the snow at automatic stations?

    Seven Worlds will Collide



  • Registered Users Posts: 19,224 ✭✭✭✭ Larbre34


    Who measures the snow at automatic stations?

    I do.


  • Registered Users Posts: 19,224 ✭✭✭✭ Larbre34


    Casement is nearest me, so 6cm peak snow depth btwn now and Monday night


  • Registered Users Posts: 8,409 ✭✭✭ Danno


    Gurteen 29cm
    OakPark 21cm


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  • Registered Users Posts: 7,759 ✭✭✭ Calibos


    Grange 0cm

    ;)


  • Registered Users Posts: 17,665 ✭✭✭✭ JCX BXC


    Knock 20cm


  • Registered Users Posts: 5,852 ✭✭✭ pauldry


    Knock 25cm
    Mullingar 14cm


  • Registered Users Posts: 1,577 ✭✭✭ Bonzo Delaney


    Think about the children...and the people who will be flooded if your right.......you just don't care!!!!! ;)

    Just a question for anyone that might know but
    How many litres of water can be expected in a cubic meter of fresh fallen snow is there a rule if thumb figure ?


  • Registered Users Posts: 12,653 ✭✭✭✭ ninebeanrows


    Mullingar 7cm.


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  • Registered Users Posts: 467 ✭✭ gerrybhoy


    Castleknock D15 3cm


  • Closed Accounts Posts: 248 ✭✭ kod87


    knock, 5cm


  • Registered Users Posts: 1,894 ✭✭✭ BLIZZARD7


    Gurteen 34cm
    Oak Park 27cm


  • Registered Users Posts: 2,023 ✭✭✭ Donegal Storm


    Claremorris 7cm


  • Registered Users Posts: 12,560 ✭✭✭✭ sryanbruen


    Calibos wrote: »
    Grange 0cm

    ;)

    :pac:

    Weather and climate site - https://www.ukandirelandclimate.com/ (advised to view on PC, not optimised for mobile)

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



  • Registered Users Posts: 13,209 ✭✭✭✭ M.T. Cranium


    Athenry 18 cm (Sunday morning) may tie with Claremorris, Knock or MtDillon
    Danno 25 cm (Monday morning) Gurteen 22 Oak Park 20

    some place could get 30 cm from this, not likely to be an official reporting site.


  • Closed Accounts Posts: 1,027 MidMan25


    Roches Point 0cm
    Cork Airport 0cm
    Moore Park 0cm


  • Registered Users Posts: 5,852 ✭✭✭ pauldry


    MidMan25 wrote: »
    Roches Point 0cm
    Cork Airport 0cm
    Moore Park 0cm

    Are you the Cork Grinch? 😀


  • Closed Accounts Posts: 1,027 MidMan25


    pauldry wrote: »
    Are you the Cork Grinch? ��

    I'm the Cork realist :pac: I'll be very happy if proven wrong!


  • Registered Users Posts: 1,534 ✭✭✭ SomethingElse


    Athenry - 0cm
    Johnstown Castle - 0cm
    Ballyhaise - 0cm
    Knock Airport - 0cm
    Belmullet - 0cm
    Mace Head - 0cm
    Carlow Oakpark - 0cm
    Malin Head - 0cm
    Casement Aerodrome - 0cm
    Markree - 0cm
    Claremorris - 0cm
    Mount Dillon - 0cm
    Cork Airport - 0cm
    Mullingar - 0cm
    Dublin Airport - 0cm
    Newport - 0cm
    Dunsany - 0cm
    Phoenix Park - 0cm
    Fermoy Moorepark - 0cm
    Roches Point - 0cm
    Finner - 0cm
    Shannon Airport - 0cm
    Gurteen Agri College - 0cm
    Sherkin Island - 0cm
    Valentia - 0cm

    EDIT: Predictions are in mm, not cm.


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  • Registered Users Posts: 14,307 ✭✭✭✭ nacho libre


    Knock 20 cm
    Mountainy Man 35 cm
    Mullingar 10cm


  • Registered Users Posts: 830 ✭✭✭ Neddyusa


    Knock 20 cm
    Mountainy Man 35 cm
    Mullingar 10cm

    Knock of course!
    How did I forget Knock? ! 😉
    Also Oak Park likely to be close to the max.

    What time are morning measurements made at the manned stations?


  • Registered Users Posts: 17,665 ✭✭✭✭ JCX BXC


    So Knock, 13cm is the final figure?


  • Registered Users Posts: 830 ✭✭✭ Neddyusa


    JCX BXC wrote: »
    So Knock, 13cm is the final figure?

    Not sure - I didn't realise that the un-manned stations have no instrument to measure snow-depth.

    Come to think of it - surely ME are missing out on a very important data-set there?!
    Or have they some other way of validating snow depths with their forecasts?


  • Registered Users Posts: 8,200 ✭✭✭ Gaoth Laidir


    Just a question for anyone that might know but
    How many litres of water can be expected in a cubic meter of fresh fallen snow is there a rule if thumb figure ?

    The liquid equivalent of snow varies with the type of snow. Dry, powdery snow can have a 40:1 ratio (i.e. 40 mm of snow would melt down to 1 mm of liquid) while yesterday's wet snow is more dense and could be more like 5:1.

    1 mm of liquid precipitation is 1 litre per sq.m, so 1 cubic metre of snow could equate to anywhere from 25 litres for dry snow to 200 litres for wet snow.

    Unfortunately the automated synoptic stations in the Republic have no depth-measuremnt instruments but in the North they do. The main airports in the Republic all report depths every hour, as do the ones in the North. Knock's 13 cm was the highest measured depth of them all.


  • Registered Users Posts: 1,577 ✭✭✭ Bonzo Delaney


    The liquid equivalent of snow varies with the type of snow. Dry, powdery snow can have a 40:1 ratio (i.e. 40 mm of snow would melt down to 1 mm of liquid) while yesterday's wet snow is more dense and could be more like 5:1.

    1 mm of liquid precipitation is 1 litre per sq.m, so 1 cubic metre of snow could equate to anywhere from 25 litres for dry snow to 200 litres for wet snow.

    Unfortunately the automated synoptic stations in the Republic have no depth-measuremnt instruments but in the North they do. The main airports in the Republic all report depths every hour, as do the ones in the North. Knock's 13 cm was the highest measured depth of them all.

    Thanks for the explanation.
    I was just curious as to whether co. councils could use snow depth as a measurement for flood risk assement when a thaw happens over a given sized area as in a football pitch covered in 100 mm of snow would potentially create thereabouts 20 k litres of water at about a 25:1 ratio .


  • Registered Users Posts: 1,280 ✭✭✭ snowstreams


    There wasnt much snow depth at the Athenry weather station but just 10 miles further inland at loughrea and the depth was about 13cm.
    Is there any weather station near ballinasloe in East Galway?


  • Registered Users Posts: 8,200 ✭✭✭ Gaoth Laidir


    The liquid equivalent of Knock's snow was actually around 10:1, as it got 13 cm of snow from 11 mm of precipitation.

    For areas lower than Knock's 206 m the snow would have been wetter and hence the ratio would have been lower, more like 5:1.

    That's the problem with automation of stations. All our stations used to be manned and so reported hourly depths. Now only the 5 main airports do so.

    We could of course install the automated ultrasonic sensors that they have in the UK (including Ulster), but I suppose the benefits are probably seen to be not worth the investment when you look at how infrequently snow affects us compared to the UK.


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