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    NOAA is about to make some big changes to its global weather model

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    • ?
      A Former User @jethroxd last edited by A Former User

      @jethroxd

      If so the practical differences in resolution and forecasting detail makes that sort of claim/comparison rather questionable, IMO.

      J 1 Reply Last reply Reply Quote 0
      • J
        jethroxd @Guest last edited by

        As I said, interesting.

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        • idefix37
          idefix37 Sailor Moderator @TomSlavkovsky last edited by

          @TomSlavkovsky
          Have you switched to the new GFS FV3 or is it still the old version which is used on Windy?

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          • T
            TomSlavkovsky | Premium last edited by

            @idefix37 yes, we are now using GFS FV3

            idefix37 Tomber42 2 Replies Last reply Reply Quote 3
            • idefix37
              idefix37 Sailor Moderator @TomSlavkovsky last edited by idefix37

              @TomSlavkovsky
              Thank you! It’s great to know!

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              • D
                dootsonfire last edited by

                So what is the grid resolution? Windy still says GFS @ 22km but isn’t FV3 @ 13km?

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                • Tomber42
                  Tomber42 Moderator @TomSlavkovsky last edited by

                  @TomSlavkovsky said in NOAA is about to make some big changes to its global weather model:

                  @idefix37 yes, we are now using GFS FV3

                  You should clarify that in the text on the windy page if you click at clock symbol

                  Gkikas LGPZ anthony10 2 Replies Last reply Reply Quote 3
                  • Gkikas LGPZ
                    Gkikas LGPZ Moderator @Tomber42 last edited by

                    @Tomber42
                    As I see the wind (or temperature) field over rough terrain (mountains)
                    I believe that GFS is (still) at 22km resolution.

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

                      @Gkikas-LGPZ
                      @dootsonfire
                      @Tomber42
                      I have got some information from weather specialists and they confirm that:

                      • the old GFS v 14 had already a native resolution of 13km same as the new GFS FV3 v 15. This is the computational resolution.
                        It is confirmed by NOAA :
                        « GFS Version 15.1 maintains a horizontal resolution of 13 km and has 64 levels in the vertical extending up to 0.2 hPa »
                      • The old GFS was dispatched to users by GRIB files with a 0.25° resolution. And this is not changed with the new GFS FV3 v 15.

                      247D2E4C-0231-43E8-B073-6C12480714FE.jpeg

                      Note that 0.25° is close to 27 km, when 23 km is 0.2°

                      1 Reply Last reply Reply Quote 1
                      • anthony10
                        anthony10 @Tomber42 | Premium last edited by

                        @Tomber42 I would also like to see the FV3 being shown in the Clock info panel, something like (GFS - FV3) just to be more clear. :)

                        1 Reply Last reply Reply Quote 2
                        • RandyBonnette
                          RandyBonnette last edited by RandyBonnette

                          Hello guys,

                          Here's where you can get more information about FV3-GFS new model: Significant information on the FV3-GFS https://www.emc.ncep.noaa.gov/users/meg/fv3gfs/official and select model (real-time): https://data1.gfdl.noaa.gov/fvGFS/fvGFS_products.php Or find the Pivotalweather portal. You can compare the data there too.

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                          • B
                            BillGIllian @RandyBonnette last edited by

                            @RandyBonnette said in NOAA is about to make some big changes to its global weather model:

                            guys,
                            Here's where you can get more information about FV3-GFS new model: Significant information on the FV3-GFS https://www.emc.ncep.noaa.gov/users/meg/fv3gfs/website and select model (real-time): https://data1.gfdl.noaa.gov/fvGFS/fvGFS_products.php Or find the Pivotalweather portal. You can compare the data there too.

                            Thanks for recommendations

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                              JamesWilliam30 Banned last edited by

                              This post is deleted!
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                                masstexting Banned last edited by

                                This post is deleted!
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                                • J
                                  jamescrane last edited by

                                  Hey Randy thanks for your reply!

                                  1 Reply Last reply Reply Quote 0
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