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    Description of weather overlays

    Frequently Asked Questions
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    • EandE
      Eand @ivo
      last edited by

      @ivo

      Could you explain difference between:

      • wawes
      • swell 1
      • swell 2
      • swell 3
      M 1 Reply Last reply Reply Quote 45
      • gjwolfswinkelG
        gjwolfswinkel | Premium
        last edited by

        The freezing altitude layer, how does that work? I am often looking at ski weather and on those sites, the current freezing altitude (frostgrenze in German, vorstgrens in Dutch) is at around 3800 meters. Yet the 'freezing level' layer shows values of 2500 to even 1900 meters for those locations, even though the current temperatures there are much higher.

        Am I misinterpreting what the freezing altitude layer actually is or does? Or is the data faulty?

        Thanks!

        ObaidfarooqO 1 Reply Last reply Reply Quote 2
        • S
          shappy4 @ivo | Premium
          last edited by

          @ivo

          Are the two numbers in the wind section - gusts and sustained winds?

          TZT 1 Reply Last reply Reply Quote 6
          • V
            vernab
            last edited by

            • how do I find the forecast for the storm Irma
            Gkikas LGPZG 1 Reply Last reply Reply Quote 1
            • Gkikas LGPZG
              Gkikas LGPZ Moderator @vernab
              last edited by

              @vernab
              https://www.windy.com/?gust,18.469,-63.896,7,a:FFMFF

              1 Reply Last reply Reply Quote 1
              • TZT
                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
                • IgorXXXmirrorI
                  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^_^;;

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

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

                    IgorXXXmirrorI J alive OranA 3 Replies Last reply Reply Quote 2
                    • IgorXXXmirrorI
                      IgorXXXmirror @TZ
                      last edited by

                      @TZ Thanks

                      IXMfoxPrower^_^;;

                      1 Reply Last reply Reply Quote 1
                      • RaniR
                        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
                        • AtalantiaA
                          Atalantia
                          last edited by

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

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

                            @Atalantia
                            wind direction 330 degrees (coming from NorthWest)

                            M 1 Reply Last reply Reply Quote 4
                            • jmdsJ
                              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
                              • alecloudenbackA
                                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.

                                sonnigekerstinS 1 Reply Last reply Reply Quote 10
                                • sonnigekerstinS
                                  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....

                                  edneffE 1 Reply Last reply Reply Quote 12
                                  • 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 LGPZG 1 Reply Last reply Reply Quote 1
                                    • Gkikas LGPZG
                                      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 LGPZG 1 Reply Last reply Reply Quote 3
                                      • Gkikas LGPZG
                                        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 LGPZG 2 Replies Last reply Reply Quote 1
                                          • Gkikas LGPZG
                                            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
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