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    Potential boundary value problem for NEMS4km model?

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    • Julie RøsteJ
      Julie Røste
      last edited by Julie Røste

      Hi!

      When browsing through the weather models that Windy offers, I observed that the NEMS 4km model (Reference time 2022-07-27T12:00:00Z) shows some extreme values for 10m wind.

      This happens at the northern (Västervik in Sweden) and southern (Valletta, south of Italy) model boundaries.
      windy NEMS Vastervik Sweden.png

      windy NEMS Valletta.png

      When comparing with Meteoblue for the same area and time, the same pattern is not observed:

      meteoblue NEMS Vastervik.png
      meteoblue NEMS Valletta.png

      To me it seems like Windy expands the region of NEMS with some kilometers, compared to the region from Meteoblue, and thus Windy includes the problematic/infinite values.
      (Or is it Meteoblue that decreases the region shown to avoid displaying the boundary value problems?)

      Do you have some explanations for this behaviour?
      And does Windy only display the model forecasts, or are some calculations (like interpolation between global and local/regional models) done?

      Thanks for a great app!

      idefix37I KorinaK 2 Replies Last reply Reply Quote 0
      • idefix37I
        idefix37 Sailor Moderator @Julie Røste
        last edited by idefix37

        @julie-røste
        Hi,
        These anomalies are still there and they are predicted for the next days on Windy NEMS map (with customized colors)

        213413BB-03DA-4757-80EA-6718C98A3C96.jpeg

        761D12C6-B685-488A-BDA9-D834493B266C.jpeg

        I will check with the next runs if Windy still shows these anomalies.

        1 Reply Last reply Reply Quote 0
        • KorinaK
          Korina @Julie Røste
          last edited by

          @julie-røste Thank you, we will look into it.

          Korina

          1 Reply Last reply Reply Quote 0
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