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    Premium windy not showing better forecast resolution?

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    • Dimitar MihaylovD Offline
      Dimitar Mihaylov | Premium
      last edited by

      Hello, I just activated a premium account but nothing changed in the forecast models regarding the resolution - the GFS is still 22km, ECWF still 9km and so on..
      It is stated that the premium accounts have access to higher resolution models but do they really?

      Thanks.

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

        @Dimitar-Mihaylov

        The resolution of weather model cannot be changed by Windy of course. In the free or the Premium version, the model resolution is basically the same.
        It was said that the images of weather prediction maps would be improved, providing a better granularity.
        This is more obvious with the higher resolution models (HRRR, AROME, ICON D2) in mountains.

        B9D23A04-C8A8-4859-9279-E94CD891DEFE.jpeg
        Temperature w/customized color scale

        Even with the models that you mention, try to make a screenshots when you are logged in and out to see the difference.

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        • Dimitar MihaylovD Offline
          Dimitar Mihaylov | Premium
          last edited by

          Well, okay, I understand but I have to say it is a bit misleading because the word "resolution" is used when explaining the difference between the forecast models and the advantages between 30-20km and 7-9km model. On the other hand it is used as an "images resolution" hence - the confusion.
          Anyway.

          Another question - if the model resolution is predetermined by itself why some apps use GFS 27 and yours use GFS 22? Where the difference come from?

          Thanks.

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          • idefix37I Offline
            idefix37 Sailor Moderator
            last edited by idefix37

            @Dimitar-Mihaylov

            In fact the resolution of GFS is 0.25°.
            1° being 111km, 0.25° is ~ 27 km. But this is when you consider the resolution in latitude.
            As far as I know when the NOAA presented this model they announced its resolution in longitude at Washington latitude.
            This sketch explains how you find 22 km.

            E7B1CECB-03E3-43C5-A3EE-EF933CEF5BA7.jpeg

            So now most model resolutions are displayed in longitude.
            The model IFS of the ECMWF which is the one shown in Windy has a 0.1° resolution. With the same calculation in longitude it gives 9km.

            Note most of the weather apps using this model of the ECMWF show in fact a free version called “WMO essentials” with a downgraded resolution of 0.5° or 43km. The fees for the 0.1° version that you get in Windy is very expensive.

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