Snow day

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Climatological knowledge

Day temperature T: max / med / min
Day temperature  T : max / med / min

Air temperature dependent days
  • T max  ≥ 35 ° C
    		•  Desert day
  • T max  ≥ 30 ° C
    		•  Hot day
  • T min ≥ 20 ° C
    		•  Tropical night
  • T max ≥ 25 ° C
    		•  Summer day
  • T med <15 ° C / 12 ° C
    		•  Heating day
  • T med ≥ 5 ° C
    		•  Vegetation day
  • T min <0 ° C
    		•  Frost day
  • T max <0 ° C
    		•  Ice day
    not uniformly defined: Cold day
    Weather- dependent days
    Cloud cover Bright day
    Cloud cover Cloudy day
    Cloud cover Foggy day
    Humidity / temperature Sultry day
    Precipitation Precipitation day
    Precipitation Rainy day
    Precipitation Hail day
    Precipitation Snow (cover) day
    storm Storm day
    storm Thunderstorm day

    Snow day , snow fall day and snow cover day are meteorological-climatological variables of the snowfall and the snow cover at a certain location.

    Snow day

    A snow day is a day on which between the early 6 a.m. and the early morning of the following day (6 a.m.) precipitation has fallen exclusively in the form of snow and the amount of precipitation (the snow is melted for the purpose of measurement) is at least 0.1  liters per  square meter or 0.1 millimeters (the latter two figures are synonymous).

    Snowfall

    In synoptic meteorology , one speaks of snowfall days or days with snow when precipitation in the form of snow has fallen at any time on a day . Until 1986, all other types of precipitation except snow were classified as 'rain' in the DWD's climate area . Since 1987, every day with solid precipitation, including sleet , hail and the like, has been considered a snowfall.

    Snow cover day

    One speaks of a snow cover day or day with a snow cover when a broken or closed snow cover , i.e. a degree of snow cover of at least 50 percent, is observed at a location during the morning climate appointment . The morning climate date in Germany has been at 05.50 a.m. UTC (ie 06.50 a.m. CET) since April 2001, previously at 06.30 a.m. UTC (ie 07.30 a.m. CET). The definition is independent of the snow depth; the definition also includes only a slight snow cover of less than 1 cm. Usually additional information is given in climate statistics, such as B. Days of snow cover with at least 1, 5 or 10 cm, which allows a more precise classification of the local snow conditions.

    other sizes

    • Snow cover duration as the number of consecutive days of snow cover
    • Snow cover time as the period from the first to the last snow cover day of a year

    List of measured values

    Snow days per year on a long-term average
    place Country Height * Snowfall d / a ∗∗ Snow cover d / a ∗∗ Averaging period ***
    Klagenfurt Austria 447 72.3 1961-2010
    Linz Austria 298 45.3 1961-2010
    Graz Austria 366 47.3 1961-2010
    Mariazell Austria 862 121.3 1961-2010
    innsbruck Austria 578 69.7 1961-2010
    St. Anton / Arlberg Austria 1298 139.7 1961-2010
    Vienna -Hohe Warte Austria 171 40.3 1961-2010
    Remarks
    ∗∗∗ Sorted by the middle of the interval

    Values:

    • Austria: snow cover at least 1 cm

    See also

    swell

    • DIN 4049-3: 1994-10 Hydrology - Part 3: Terms for the quantitative hydrology

    Notes and individual references

    1. ↑ Note: In contrast to the color markings for the temperature thresholds, the 0 ° C line on the graphic is on the border between turquoise and blue. →  Annual cycle of the graphic (animated)
    2. ↑ a b c d e f g h i j k l m n o Climatological knowledge days in the weather dictionary of the German Weather Service
    3. ↑ Germany : 15 ° C according to VDI 2067 ; Austria , Switzerland , Liechtenstein : 12 ° C according to Usance
    4. ↑ also T med ≥ 10 ° C: day of the main vegetation period
    5. ↑ Snow day ( Memento of the original from August 21, 2011 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / www.deutscher-wetterdienst.de archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , DWD weather dictionary
    6. ↑ see Precipitation Height ( memento of the original from July 10, 2012 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / www.deutscher-wetterdienst.de archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. , DWD weather dictionary
    7. ↑ See note in: Meteorological mean and extreme values ​​from Berlin-Dahlem , section entry dates , K. Sieland, Jörg Wichmann, Manfred Wegener, Institute for Meteorology of the Free University of Berlin
    8. ↑ Three questions about winter in Austria - Will winters in Austria be warmer or colder? ZAMG Klima News , December 1, 2016 (selected stations, three items for the climate trend).