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    How to read Meteogram

    Frequently Asked Questions
    meteogram
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    • Korina
      Korina Administrator last edited by Korina

      Here is a description of units in Meteogram

      Displayed temperature and dew point represents values 2m above the surface.

      framee 1.png

      Wind displays average wind speed 10m above the surface level.
      Wind gusts display values 10m above the surface in the last 3 hours.

      framee 2.png

      Shaded area symbolises temperature on the upper side and dew point on the lower side. Color matches with the values given, corresponds with the color scale.

      Temperature is close to the dew point = air is humid
      The difference between temp. and d.p. is bigger = air is dry
      Dew point and temp. are equal = relative humidity is 100% (fog)

      framee 4.png

      800h is short for 800hPa
      5km and 6400ft represent elevation both in meters and feet
      FL100 is short for Flight Level 10000ft
      framee 5.png

      Atmospheric pressure asl
      Some values of this curve are shown in the hPa line.

      framee 6.png

      Different colors of precipitations are explained in the Meteogram detail.

      Deep blue = rain
      Pink = convective rain
      Light blue = snow

      framee 7.png

      Yves70 Gkikas LGPZ 2 Replies Last reply Reply Quote 18
      • Yves70
        Yves70 Meteorologist @Korina | Premium last edited by

        @korina
        Very nice summary Korina. Will be useful for a lot of users !

        1 Reply Last reply Reply Quote 2
        • G
          gzz1368699841 Banned last edited by

          This post is deleted!
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          • Gkikas LGPZ
            Gkikas LGPZ Moderator @Korina last edited by Gkikas LGPZ

            @korina
            Please add explanation for the shadows of gray.
            I think represent relative humidity aloft (not clouds). Isn't it?

            A 1 Reply Last reply Reply Quote 2
            • H
              hgk209 last edited by hgk209

              Thanks for the descrition. I have a question about the gray shades (relative humidity?) on the bottom of the meteogram. It appears that there are 7 shades of gray. How do the shades of gray and the relative humidity correspond (Whitch shade of gray represents what level of humidity)?
              Thanks.

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

                @hgk209
                First of all, we should get the confirmation about the exact meaning of the shades of grey. Is it humidity level or cloud cover ? High level of humidity doesn’t necessary mean clouds

                @Korina
                @ivo
                Could you let us know ? Thanks

                C 1 Reply Last reply Reply Quote 3
                • idefix37
                  idefix37 Sailor Moderator last edited by

                  Please find additional information about Meteogram and cloudiness:

                  https://community.windy.com/topic/10309/cloudbase-meteograms?_=1608981618271

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

                    @idefix37
                    Thanks, this is clear now. Grey shades in the meteogram are linked to relative humidity, not cloud cover

                    Yves70 1 Reply Last reply Reply Quote 0
                    • Yves70
                      Yves70 Meteorologist @Yves70 | Premium last edited by Yves70

                      Having said that, relative humidity is a great tool to better understand, very quickly, the situation and even if you cannot completely linked cloud cover and relative humidity, they are both linked in a way.
                      Cloud maps are still necessary to assess the real cloud cover, knowing that in any case, those cloud maps are not super accurate,...
                      Sounding can complete the analysis

                      1 Reply Last reply Reply Quote 2
                      • M
                        marketingzet last edited by

                        thanks for sharing..

                        1 Reply Last reply Reply Quote 1
                        • C
                          crazycats last edited by

                          That's a very helpful guide for a beginner like me with the app. Now some noob questions -
                          a. I didn't quite get the Shaded area description
                          b. how do I check that there's only high clouds at a site and say in the direction of sun no low/middle clouds
                          c. how do I check for cloud inversion from a hilltop in a valley. sometimes its also referred as low clouds / fogs but following that had me stuck in thick fog on hills

                          thanks so much in advance.

                          kind regards

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

                            @crazycats
                            Hi,
                            a. Which shaded area are you referring? In Meteogram the explanation is given in posts here above.
                            b. Check High, Medium and Low clouds layers. If necessary see More layers... The direction of the sun is given by a plugin only available on website. Menu > Install plugins > Sun position
                            c. You probably mean in case of temperature inversion, which brings a cloud / fog layer below the inversion. You can check that by using the Sounding feature. Right click on mouse.

                            Capture d’écran 2021-01-09 à 09.08.37.png

                            • Temperature inversion when the temperature (red curve) is increasing with altitude instead of decreasing.
                            • Clouds when temperature and dew point are close together (red and blue curves)

                            Note that the weather model can only show this phenomenon at large scale but not in local conditions like in a mountain valley.

                            1 Reply Last reply Reply Quote 4
                            • G
                              galtsev | Premium last edited by

                              hello, how to enable the map "globe" ??

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

                                @galtsev Hi, we do not offer globe yet, so it is not possible to view it.

                                1 Reply Last reply Reply Quote 0
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                                  well66 Banned last edited by

                                  This post is deleted!
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                                  • ryan777wong
                                    ryan777wong Banned last edited by

                                    This post is deleted!
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                                    • Z
                                      zzzzzzxxx last edited by

                                      Где тут можно вопрос задать ??? Не могу найти

                                      Yves70 1 Reply Last reply Reply Quote 0
                                      • Yves70
                                        Yves70 Meteorologist @zzzzzzxxx | Premium last edited by

                                        @zzzzzzxxx
                                        What is the subject of your question ?

                                        Z 1 Reply Last reply Reply Quote 0
                                        • Z
                                          zzzzzzxxx @Yves70 last edited by

                                          Почему высота над уровнем моря у меня на Туристической карте уже не показывает?

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                                            ganeshshastri Banned last edited by

                                            This post is deleted!
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