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    Description of weather overlays

    Frequently Asked Questions
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    • TZ
      TZ Administrator @shappy4 last edited by

      @shappy4 The first number is wind direction and the second one is wind velocity (average value for last 3 hours).

      1 Reply Last reply Reply Quote 3
      • IgorXXXmirror
        IgorXXXmirror last edited by

        Hello. What does the height of 100 meters mean? Above sea level or terrain? The navigation satellite writes that I have a height of 160 meters above sea level (160 m msl).

        IXMfoxPrower^_^;;

        TZ 1 Reply Last reply Reply Quote 0
        • TZ
          TZ Administrator @IgorXXXmirror last edited by

          @IgorXXXmirror Hi, 100m layer is above model terrain. Unfortunatelly it is very coarse terrain with 9km horizontal resolution.

          IgorXXXmirror J A 3 Replies Last reply Reply Quote 2
          • IgorXXXmirror
            IgorXXXmirror @TZ last edited by

            @TZ Thanks

            IXMfoxPrower^_^;;

            1 Reply Last reply Reply Quote 1
            • Rani
              Rani @ivo | Premium last edited by

              @ivo

              When using wave overlay, I see a color key indicating wave height and also boxes with values in them with either- or~ before the value. These numbers never match the color key .

              Please explain.

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

                What means the 330 before 64km/h? 0_1507996931412_WindyScreen.png

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

                  @Atalantia
                  wind direction 330 degrees (coming from NorthWest)

                  M 1 Reply Last reply Reply Quote 4
                  • jmds
                    jmds last edited by

                    @ivo said in Description of weather overlays:

                    Rain rate:

                    I cannot see RAIN RATE in the settings ....

                    1 Reply Last reply Reply Quote 2
                    • alecloudenback
                      alecloudenback | Premium last edited by

                      Is there an overview of the meteograms that Windy displays for the forecasts? I am not sure of what some of the background colors and charts mean.

                      sonnigekerstin 1 Reply Last reply Reply Quote 9
                      • sonnigekerstin
                        sonnigekerstin @alecloudenback | Premium last edited by

                        @alecloudenback Me neither. I was searching for a manual to find out about the meaning of the different colors,graphs,pictograms etc....

                        edneff 1 Reply Last reply Reply Quote 11
                        • J
                          joalb @TZ last edited by

                          @tz What height does surface refer to? There would technically be no wind at the surface, so it must be some standard height above the ground (whatever the common reading instrument height is). What is that height? (i.e. 2m, 10m, 20m?). I'd like to use the data to estimate wind shear at a given location and using surface (0m) is not valid.

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

                            @joalb
                            Surface wind refers to 10m above model's surface.
                            Surface temperature refers to 2m.

                            For ECMWF datasets, see https://www.ecmwf.int/en/forecasts/datasets/set-i
                            For ICON, see chapter 6 (Global output fields) in
                            "Database Reference Manual for ICON"
                            https://www.dwd.de/SharedDocs/downloads/DE/modelldokumentationen/nwv/icon/icon_dbbeschr_aktuell.html

                            Gkikas LGPZ 1 Reply Last reply Reply Quote 2
                            • Gkikas LGPZ
                              Gkikas LGPZ Moderator @Gkikas LGPZ last edited by

                              .... or scroll on top of this page

                              1 Reply Last reply Reply Quote 2
                              • J
                                jwh @ivo last edited by

                                @ivo From Leilani Estates Big Island Hawaii: what is the source of SO2 data? Satellite only? Any way to include data from ground monitors such as: http://weather.hawaii.edu/vmap/hysplit/ ?

                                Gkikas LGPZ 2 Replies Last reply Reply Quote 1
                                • Gkikas LGPZ
                                  Gkikas LGPZ Moderator @jwh last edited by

                                  @jwh
                                  For the source of SO2 data ....click ...
                                  0_1527573931458_69a4c7f2-385d-472b-a661-fe6d2ca57ea3-εικόνα.png

                                  1 Reply Last reply Reply Quote 2
                                  • Gkikas LGPZ
                                    Gkikas LGPZ Moderator @jwh last edited by

                                    @jwh
                                    https://community.windy.com/topic/5982/so2-actual-time-or-predicted

                                    1 Reply Last reply Reply Quote 0
                                    • IgorXXXmirror
                                      IgorXXXmirror last edited by

                                      What does it mean in lightning l / km ^ 2?

                                      IXMfoxPrower^_^;;

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

                                        @igorxxxmirror
                                        lightnings per square kilometer.

                                        1 Reply Last reply Reply Quote 3
                                        • T
                                          TomSlavkovsky API developers last edited by

                                          @Gkikas-LGPZ @IgorXXXmirror There is a mistake pointed out by ECMWF - it should be flash/km2/day.

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

                                            @tomslavkovsky
                                            If the unit is flash/km2/day, why does the map changes every 3 hours? Is it a sliding average over 24 hours? Looking to the way how thunderstorms move on the map every 3 hours, it seems surprising

                                            Gkikas LGPZ 1 Reply Last reply Reply Quote 1
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