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    Zohlednění nadmořské výšky v předpovědi

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    • malda.neraM
      malda.nera | Premium
      last edited by

      Dobrý den, na příkladu bych se chtěl zeptat, jak se vypočítává předpověd pro danou lokalitu.

      1. lokalita v nadmořské výšce 70 m https://www.windy.com/45.767/10.810?45.768,10.833,14,i:pressure
      2. lokalita o kousek vedle v n.v. 2000 m https://www.windy.com/45.744/10.859?45.738,10.813,13,i:pressure
        Obě lokality ukazují např. stejnou teplotu. Zavádějící je, že předpoveď je jakoby vypočítána pro danou lokalitu - informace o místě ukazují správnou nadmořskou výšku (ECMF i GFS se chovají stejně).
        Jak je to tedy vypočítáno? Pro jakou nadmořskou výšku je model počítán?
        Je možné n.v. nějak zohlednit, příp. i do budoucna?
        Děkuji
      idefix37I 1 Reply Last reply Reply Quote 0
      • idefix37I
        idefix37 Sailor Moderator @malda.nera
        last edited by idefix37

        @malda-nera
        Hello,
        You know that weather model data is delivered at grid points.
        The distance between each of this points is about the resolution of the model. For instance 9km for ECMWF or 22km for GFS.
        Then Windy interpolates the values at grid points which are smoothed to display the weather maps.
        So, in mountains the temperature forecast cannot be very accurate.
        In addition the model integrates a coarse orography model (terrain model) which does not accurately ‘see’ the altitude of a location.
        The difference between the actual elevation and the model elevation is provided on the Windy sounding graphic at a location (long press on mobile screen or right click on desktop).

        51546C4F-34E5-4BA5-8B00-DCE66A8D4B02.jpeg

        It explains the inaccuracy of temperature in mountains with global weather models. It is better to use high resolution regional models in mountains if they are available, for example ICON-D2 in this area. Try with it.

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