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    What source of weather data Windy use?

    Frequently Asked Questions
    model grib file
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    • vsinceacV
      vsinceac | Premium
      last edited by vsinceac

      I think the best would be to clearly display on UI the validity time of the static data displayed on isolines layer (pressure, temperature, etc.).
      This way I think nobody would say that it is a bug: users should easily understand this.
      It is the same as when displaying a time series of observed data today AND of the data observed one year ago, on the same 2D plot; this is often used in analysis and it is really useful when the validity time of each time series is clearly labelled.

      ¯\_(ツ)_/¯

      1 Reply Last reply Reply Quote 2
      • idefix37I
        idefix37 Sailor Moderator @jmh2002
        last edited by idefix37

        @jmh2002
        I don’t think a warning pop up would be a good idea (it is not in the Windy culture). IHMO it could be done automatically when isobars are selected together with satellite layer i.e. isobars should be displayed at about same hour as the last satellite observation as @Gkikas-LGPZ said.
        I think this is possible in the same way as when you select Rain accumulation with ECMWF at 10 days and switch to ICON, the time lapse is automatically set back to 12h.

        1 Reply Last reply Reply Quote 2
        • jmh2002J
          jmh2002 Moderator Mariners - Seafarers Sailor
          last edited by

          @Korina @developers

          Please review these last comments and note and discuss with the development team regarding how this can be improved, thank you :)

          WINDY is everywhere :)

          KorinaK 1 Reply Last reply Reply Quote 1
          • KorinaK
            Korina @jmh2002
            last edited by

            @jmh2002 @idefix37 @vsinceac Hi all, it seems as a bug, I will let our development team know. Thank you for reports!

            Korina

            1 Reply Last reply Reply Quote 3
            • P
              peteraschindler | Premium
              last edited by

              You mention that NEMS is only available in Europe.
              But, I'm based in Hong Kong, and METEOBLUE is shown, besides GFS and ECMWF, as models for this location.
              Why?
              Thank you!
              Peter S

              KorinaK idefix37I 2 Replies Last reply Reply Quote 0
              • KorinaK
                Korina @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

                1 Reply Last reply Reply Quote 0
                • idefix37I
                  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

                  1 Reply Last reply Reply Quote 0
                  • Yves70Y
                    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.

                    1 Reply Last reply Reply Quote 0
                    • J
                      jerryw @Zeeshi7897 | Premium
                      last edited by

                      @Zeeshi7897

                      1 Reply Last reply Reply Quote 0
                      • 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

                        KorinaK 1 Reply Last reply Reply Quote 0
                        • KorinaK
                          Korina @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 @A Former User | 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.

                            1 Reply Last reply Reply Quote 0
                            • howardkuoH
                              howardkuo
                              last edited by

                              Is it possible to default to NAM instead ECMWF?

                              idefix37I 1 Reply Last reply Reply Quote 0
                              • idefix37I
                                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.

                                1 Reply Last reply Reply Quote 0
                                • foobarjoF
                                  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

                                  1 Reply Last reply Reply Quote 0
                                  • Arda GulcilA
                                    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

                                    KorinaK idefix37I 2 Replies Last reply Reply Quote 0
                                    • KorinaK
                                      Korina @Arda Gulcil
                                      last edited by

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

                                      Korina

                                      1 Reply Last reply Reply Quote 1
                                      • idefix37I
                                        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

                                        Arda GulcilA 1 Reply Last reply Reply Quote 3
                                        • Arda GulcilA
                                          Arda Gulcil @idefix37
                                          last edited by

                                          @idefix37 thank you very much ,crystal clear.

                                          1 Reply Last reply Reply Quote 0
                                          • rkeel61R
                                            rkeel61 @TomSlavkovsky | Premium
                                            last edited by

                                            @TomSlavkovsky why don't you go through the help settings and figure it out.
                                            Why do people say the dumbest thing.
                                            They've got four models they use.
                                            Mind boggles me what's wrong with people

                                            rkeel

                                            KorinaK 1 Reply Last reply Reply Quote 0
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