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    What source of weather data Windy use?

    Frequently Asked Questions
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    • Korina
      Korina Administrator @peteraschindler last edited by

      @peteraschindler Hello, NEMS is a local weather model created by Meteoblue. Meteoblue model is only available in the detailed forecast and yes, it is global model.

      Korina

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      • idefix37
        idefix37 Sailor Moderator @peteraschindler last edited by

        @peteraschindler
        Find here additional information about the difference between NEMS and METEOBLUE. It is called Meteoblue AI by this forecast provider:
        https://community.windy.com/topic/10316/metoblue-wildly-inaccurate-in-the-sw-usa/4?_=1588859394205

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        • Yves70
          Yves70 Meteorologist | Premium last edited by

          @peteraschindler
          Meteoblue is a Swiss company who developped a global model called NEMS. With this model, you can get weather forecast all over the world as this a global model, as GFS for instance.

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          • J
            jerryw @Zeeshi7897 | Premium last edited by

            @Zeeshi7897

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            • Y
              yqw last edited by

              What is the data source for satellite? How does Windy get it from EUMETSAT?
              1.png
              If it is EUMETCast Satellite Europe - Ku-band than what do you get from it?
              2.png
              Does Windy pay EUMETSAT for it?
              alt text

              Korina 1 Reply Last reply Reply Quote 0
              • Korina
                Korina Administrator @yqw last edited by

                @yqw Hello, the source is Eumetsat and data are displayed based on the contract.

                Korina

                1 Reply Last reply Reply Quote 1
                • T
                  TTurbyfill8 @sv1aaw | Premium last edited by

                  @sv1aaw That would be great. WU was extremely accurate until Weather.com bought them and they dismantled the PWS network. I am in Central America and the WU 6 hour graphic forecasts could be relied upon. It was a game to see how accurate they were to the quarter hour.

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                  • howardkuo
                    howardkuo last edited by

                    Is it possible to default to NAM instead ECMWF?

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

                      @howardkuo
                      The default model of Windy is the model from ECMWF. It is not possible to set another model as default.

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                      • F
                        foobarjo @dzuremar last edited by

                        @dzuremar said in What source of weather data Windy use?:

                        @idefix37 Hello ! We use AROME with resolution 0.01° (1.3km). Both of the AROME resolutions have 00, 06, 12 and 18 ref time runs. There are also 03, 09, 15 and 21 ref time runs which we don't process. Advantage of AROME 0.025° (2.5km) is that it includes pressure-level layers. AROME 0.01° provides only surface-level layers, only wind and relative humidity are additionally in 20m, 50m and 100m altitude. However, AROME 0.025° also covers much smaller area - a square that covers whole France and a bit of surrounding area.

                        It seems that the AROME 0.025 now cover the same area as AROME 0.01. Is there any chance that Windy switch, or add AROME 0.025 to the supported models? The area of new icon D2 is quiet small either. The french paragliding community badly needs the pressure layers on the AROME model

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                        • Arda Gulcil
                          Arda Gulcil last edited by

                          Hello, my first message/question in the community hope no problem to ask such question. Which model you suggest to use in sailing in Turkish Aegean and Mediterranean coasts ? Thanks
                          Arda

                          Korina idefix37 2 Replies Last reply Reply Quote 0
                          • Korina
                            Korina Administrator @Arda Gulcil last edited by

                            @arda-gulcil Hello, I recommend trying all the available models to find the best one for the location.

                            Korina

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                            • idefix37
                              idefix37 Sailor Moderator @Arda Gulcil last edited by idefix37

                              @arda-gulcil
                              Hi,
                              I would not recommend only one model.
                              You know there are models providing long-range forecast (up to 10 days) and some short-range forecast (up to 2 days). The first ones have a lower resolution (about 10km or more), the second ones have a higher resolution (about 4km) in your area.
                              So the first ones are useful to know the weather in the next 5 or 7 days.
                              In this category I would recommend the ECMWF model, for instance to know if the Meltem wind is predicted to be strong next week.
                              For medium-range forecast try ICON EU
                              And for the shorter-range forecast it is better to use NEMS as this Mediterranean area shows a large quantity of mountainous coasts and islands. So you need a high resolution model to get more precision about wind force and direction. Local winds are highly influenced by mountains in the Aegean Sea.

                              Examples today at same hour
                              (shown with customized colours for wind):

                              ECMWF 9km resolution - 10-days range.
                              The Meltem strength is shown to be fairly even.

                              1BE425B3-B50E-4739-86C4-36AAB2513D23.jpeg

                              ICON 7km resolution - 5-days range
                              The wind is shown stronger between islands and weaker on leeward coasts.

                              716C9E89-D08F-42F7-B730-C95EFAFC2D81.jpeg

                              NEMS 4km resolution - 2.5-days range
                              The wind is shown even more accurately around islands and capes.

                              FDAE1F5B-6A50-4BFC-9BC6-6B4598F8D336.jpeg

                              My colour scale for wind is
                              Blueish green : 4 Beaufort
                              Bright green : 5 Beaufort
                              Orange : 6 Beaufort

                              1 Reply Last reply Reply Quote 1
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