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    • D
      Damir120505 @Korina last edited by

      @korina, with premium I can see +001, +002, +003, +004... and +000 hours forecasts?

      Korina 1 Reply Last reply Reply Quote 0
      • Korina
        Korina Administrator @Damir120505 last edited by

        @damir120505 Forecast is also available for 0 am -
        Screenshot 2021-01-28 at 13.49.00.png

        Korina

        D 1 Reply Last reply Reply Quote 0
        • D
          Damir120505 @Korina last edited by

          @korina, no. I didn't mean 00 am. The model is updated every 3 or 6 hours. After the update, the first available forecast is +003 hours (+001), but Windy does not have a +000 forecast (analysis).

          Korina idefix37 2 Replies Last reply Reply Quote 0
          • Korina
            Korina Administrator @Damir120505 last edited by

            @damir120505 The ECMWF model is updated every 12 hours (every 6 hours with Windy Premium). Each model has a different update times.

            Korina

            1 Reply Last reply Reply Quote 0
            • idefix37
              idefix37 Sailor Moderator @Damir120505 last edited by idefix37

              @damir120505
              Please show a screenshot ! You are not clear.
              Are you talking about time shown in the time line or in Meteogram?

              Gkikas LGPZ 1 Reply Last reply Reply Quote 1
              • D
                Damir120505 last edited by

                @idefix37, I'll show example on GFS. Last update - 00 UTC. First available forecast is for 01 UTC (+001). But I need chart for 00 UTC hour (+000 or Analysis).
                c1c3b2ba-21e8-4ab5-8138-9a45f7ef2790-image.png

                Korina 1 Reply Last reply Reply Quote 0
                • Gkikas LGPZ
                  Gkikas LGPZ Moderator @idefix37 last edited by

                  @idefix37
                  I think damir talks about initial data for every run of the model.

                  1 Reply Last reply Reply Quote 1
                  • Korina
                    Korina Administrator @Damir120505 last edited by

                    @damir120505 The forecast data are valid until the next update time (or ref time). This is just how the GFS or other models work.

                    Korina

                    D 1 Reply Last reply Reply Quote 0
                    • D
                      Damir120505 @Korina last edited by

                      @korina, any model have analysis map. If model updated in 00 UTC it has forecast for +001 and analysis. But analysis ISN'T forecast of previous model run. For example, init time and valid time are same on this picture. Unfortunately, Windy has no analysis map.
                      a0d1d58a-017b-4383-8062-8ab5c3d0097b-image.png

                      Korina 1 Reply Last reply Reply Quote 0
                      • Korina
                        Korina Administrator @Damir120505 last edited by

                        @damir120505 You can learn more about reference and update time here -

                        https://community.windy.com/topic/11361/a-difference-between-reference-time-and-update-time

                        Korina

                        D 1 Reply Last reply Reply Quote 0
                        • D
                          Damir120505 @Korina last edited by

                          @korina, I knew the information from the topic before.
                          Indeed, before starting to calculate weather forecasts for the future, the model analyzes the weather at 00 and 12 UTC and receives a "map" for this time. This time is called analysis or +000 hours. But the first available term in Windy is an hour or 3 after the analysis (+001 or +003 hour).

                          idefix37 1 Reply Last reply Reply Quote 0
                          • idefix37
                            idefix37 Sailor Moderator @Damir120505 last edited by idefix37

                            @damir120505
                            For ECMWF Analysis is not disseminated together with Forecasts.
                            https://www.ecmwf.int/en/forecasts/documentation-and-support/data-delivery/dissemination-schedule

                            May be Windy chose not to acquire the Analysis but only the Forecasts.

                            Same for GFS
                            https://www.nco.ncep.noaa.gov/pmb/nwprod/prodstat/

                            Yves70 1 Reply Last reply Reply Quote 2
                            • Yves70
                              Yves70 Meteorologist @idefix37 | Premium last edited by

                              Yes, @idefix37 is right, there is a delay between analysis and forecast, as described in the link proposed by @idefix37. This should be the case for other models.
                              Price to acquire data and analysis can explain that people go for the forecast

                              1 Reply Last reply Reply Quote 2
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