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    Significant Difference From US NWS Forecast Highs (NAM & GFS)

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    • dkmardockD
      dkmardock | Premium
      last edited by

      Hello there, I find Windy to be an excellent weather app but I am finding in the last 6 months that it consistently predicts daily highs about 3°F to 5° lower than the NWS when I am using the NAM Model. It is 5°F to 7°F using the GFS Model. I am using the same specifically mapped area in the model in Tucson, AZ for both the NWS and Windy. Any ideas why the difference please? Windy has a lot of wonderful features very well presented and a very quick website. However on a 110° degree day high temperature forecasts can be critical.
      66e666ad-86d9-4d03-93d7-e9ac86feb83d-image.png
      29e17e89-acf6-4346-8a76-e8ccd4b75422-image.png

      Thank you and best regards,
      Dan Mardock
      Premium User

      idefix37I 1 Reply Last reply Reply Quote 0
      • idefix37I
        idefix37 Sailor Moderator @dkmardock
        last edited by idefix37

        @dkmardock
        Hi, the temperature differences are probably due to your location in the foothills. Some model grid points may be on the higher part of the terrain and the interpolation may not be as accurate as on a flat location.
        Have you tried the HRRR model? Its higher resolution should give better results.
        This website should allow you to understand what I mean. Enter your exact location.

        dkmardockD 1 Reply Last reply Reply Quote 0
        • dkmardockD
          dkmardock @idefix37 | Premium
          last edited by

          @idefix37 Thank you.

          1 Reply Last reply Reply Quote 0
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