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    wind gust definition

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    • vracanV
      vracan
      last edited by

      Hello
      I have a question about what is defined by "wind gust".
      If say it is reported on a given time that the wind is 15km/hr and wind gust is shown as 20km/h, does that mean the the steady wind is 15km/hr but it goes up yo 20km/hr periodically? or does it mean that 15km/hr wind can peak up to 35km/hr?

      This is important to me since I fly ultralight aircraft.

      idefix37I 1 Reply Last reply Reply Quote 0
      • Yves70Y
        Yves70 Meteorologist | Premium
        last edited by

        @vracan
        Definition is the following :
        Wind gusts: Wind gusts 10 meters above the surface in the last 3 hours. Actual wind at the ground is influenced by so many factors like mountains, cities and thermal effects. ECMWF model has a different method of Wind gusts computation, resulting in higher values than other models.

        1 Reply Last reply Reply Quote 1
        • idefix37I
          idefix37 Sailor Moderator @vracan
          last edited by idefix37

          @vracan
          In Windy, Wind is the averaged speed, observed generally over 10 minutes.
          Wind gusts are the max wind speed. But the wind gusts speed are not supposed to be cumulated with the averaged wind.
          In your example, Wind gusts are predicted reaching 20km/h, not 35km/h.
          Sometime it is said ... if gusts exceed the average wind by x kt or y %...this is only to classify the gusts:
          https://en.m.wikipedia.org/wiki/Wind_gust

          vracanV 1 Reply Last reply Reply Quote 1
          • vracanV
            vracan @idefix37
            last edited by

            @idefix37 thankyou

            1 Reply Last reply Reply Quote 0
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