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    Feature or bug? WBGT calculation for lat 33°

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    • Lester RobertsL Offline
      Lester Roberts | Premium
      last edited by Lester Roberts

      I'm at approximately 112°W and 33.3°N (Phoenix). I have been using the WBGT function for over a year now without realizing it was incorrect. The only reason is matters now is that I need to use it for work. However, Windy is not giving the correct result. I found this by extracting the pressure, air temperature, solar irradiance, and humidity values for the location of interest from within the Windy app HRR (other models give similar results) and plugging it into the NWS WBGT calculator. The reported WBGT across every Windy model is less than 75 while the actual WBGT according to the metrics of interest equates to WBGT 89°.

      idefix37I 1 Reply Last reply Reply Quote 0
      • idefix37I Offline
        idefix37 Sailor Moderator @Lester Roberts
        last edited by idefix37

        @Lester-Roberts
        Windy does not provide data of WBGT (“wet bulb globe temperature”) which is different from “wet bulb temperature”.
        In Windy the layer is forecasting the temperature displayed by the wet thermometer in a weather station.
        While the WBGT stress index includes additional parameters such as solar radiation, cloudiness, humidity, etc.
        Here is 2 methods for calculating this index, but you will find many others in the scientific literature:
        https://en.m.wikipedia.org/wiki/Wet-bulb_globe_temperature
        https://www.weather.gov/tsa/wbgt

        Lester RobertsL 1 Reply Last reply Reply Quote 1
        • Lester RobertsL Offline
          Lester Roberts @idefix37 | Premium
          last edited by

          This post is deleted!
          idefix37I 1 Reply Last reply Reply Quote 0
          • idefix37I Offline
            idefix37 Sailor Moderator @Lester Roberts
            last edited by idefix37

            @Lester-Roberts
            Yes, you're right, just a typo from the automatic spell checker. I'll fix it.

            1 Reply Last reply Reply Quote 1
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