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First frost

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  • 03-10-2006 12:09pm
    #1
    boardsdotie
    Closed Accounts Posts: 254 ✭✭


    Met eireann forcasting slight frost tonight and tomorrow morning.


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    #2
    Mothman
    Closed Accounts Posts: 6,498 ✭✭✭Mothman


    There was a grass frost on 16th September, with -2C recorded at Dublin Airport.


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    #3
    The Hill Billy
    Registered Users Posts: 22,778 ✭✭✭✭The Hill Billy


    Daily data for Dublin Airport on met.ie has the Min Temp as 3.5C. :confused:


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    #4
    Mothman
    Closed Accounts Posts: 6,498 ✭✭✭Mothman


    Hill Billy wrote:
    Daily data for Dublin Airport on met.ie has the Min Temp as 3.5C. :confused:

    That min is the AIR min, which is recorded in a screen 1.2m (4ft) above ground.

    The min I mentioned is the GRASS min, which was exactly -1.9C (I rounded it to -2C and is also mentioned on the daily data page). This is the min measured by an exposed thermometer 5cm (2 inches) above ground and touching the grass tips.

    When a slight frost is mentioned, it is usually refering to grass temp falling below zero. Usually in my experience ia frost isn't really visible unless grass temp falls below -3C which is probable is some sheltered spots or frost hollows tonight.


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    #5
    boardsdotie
    Closed Accounts Posts: 254 ✭✭boardsdotie


    11C Limerick and falling

    8C on the east coast


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    #6
    Danno
    Registered Users Posts: 8,913 ✭✭✭Danno


    1am: 6.1c, Clear as a whistle and cold!


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    #7
    Mothman
    Closed Accounts Posts: 6,498 ✭✭✭Mothman


    Air min 2.4C
    Grass Min -1.1C


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