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    Windy launches Satellite layer

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    • P
      phouqueoff
      last edited by

      Love the idea. I know it can only improve as it goes through Beta stage testing.

      1 Reply Last reply Reply Quote 0
      • idefix37I
        idefix37 Sailor Moderator
        last edited by

        It's really fabulous !! This addition is huge, congratulations to the team !

        1 Reply Last reply Reply Quote 6
        • setvakS
          setvak @Gkikas LGPZ
          last edited by

          @Gkikas-LGPZ

          Detailed description of why we (weather satellite community) use this color scheme can be found e.g. here: https://cwg.eumetsat.int/color-enhancements/

          In brief - the color layout follows:

          1. Wien's displacement law - blue color represents warmer range, red coldest range (the same principle as color of stars in astronomy)
          2. Red is for a human brain a signal of some form of danger - in case of convective storms the most dangerous parts of storm tops are the highest tops, which are also the coldest ones.

          The typical color enhancement range for European (mid-latitude) storms is between 200K (red) and 240K (blue). For higher latitudes it needs to be shifted to the warmer range, while for tropics and subtropics it needs to be shifted to 190-230K, for the highest storms to 185-225K. It does NOT represent actual distribution and intensity of precipitation, though the coldest parts of storms are in most cases precipitating. In some cases even cirrus clouds (namely those in mountain waves or in a jet-stream) can be very cold, but without any precipitation.

          Martin Setvák, CHMI

          Gkikas LGPZG 1 Reply Last reply Reply Quote 13
          • iz5bxfI
            iz5bxf | Premium
            last edited by

            Simply Fantastic

            1 Reply Last reply Reply Quote 4
            • Gkikas LGPZG
              Gkikas LGPZ Moderator @setvak
              last edited by

              @setvak
              thank you for the definitions.
              Here in Windy (INFRA+) and for Mid-Latitudes, colored (blue) layer starts at 240K (-33C) ?
              Personally, I preffer to start "colorize" IR images from -20C, which is a typical temp. for TCU starting to become a CB (IMHO)

              setvakS 1 Reply Last reply Reply Quote 1
              • setvakS
                setvak @Gkikas LGPZ
                last edited by

                @Gkikas-LGPZ

                The reason for selecting 240K is that most storm anvils are at roughly this temperature (their warmest parts). When we were testing this color scheme about 12 years ago, we wanted to have the blue approx. outlining the storm anvils. Warmer temperatures depict also some of the lower, mid-level clouds, which we wanted to avoid.

                1 Reply Last reply Reply Quote 4
                • TZT
                  TZ Administrator @Gkikas LGPZ
                  last edited by

                  @Gkikas-LGPZ It should be as @setvak wrote, i.e. range 240-200K, because we tried to create same palette like CHMI. Unfortunately it seems that there is still some bug, so the colour values are shifted. We will fix it.
                  I agree that it could be useful to shift colours for tropical/polar regions, but it could be misleading to use one colour for different temperatures in one picture. So this will probably remain constant.

                  setvakS 1 Reply Last reply Reply Quote 2
                  • setvakS
                    setvak @TZ
                    last edited by

                    @TZ
                    You can try using some of the color palettes which are downloadable from the link above, or you can contact me directly by email. I would highly appreciate if the colors and their range can be the same (or very close) as on our website (http://portal.chmi.cz/files/portal/docs/meteo/sat/data_jsmsgview.html >> IR-BT), this way we would not confuse the public. EUMETSAT also uses the same color palette.
                    Re: (not) shifting the color range: this was rather a note that other weather services modify the range depending on their latitude or geographical region; for global images (as those used by you) this is impossible. BTW, the color scale usability also depends at the given location on actual height of the tropopause - with lower tropopause (e.g. polar air intrusions) the storm top temperatures are generally warmer, thus in those cases the storm tops appear in IR-BT images more blueish ...

                    Gkikas LGPZG 1 Reply Last reply Reply Quote 4
                    • D
                      djare
                      last edited by

                      5 min step, as well as some next 60 min prediction, would be very usefull

                      Tomber42T 1 Reply Last reply Reply Quote 0
                      • ChriscodC
                        Chriscod
                        last edited by Chriscod

                        Hi Windfolk
                        I use my ap for areas over the coast mostly. Great South Bay NY (southern Long Island)
                        the current Sat image is very dark in all the water areas which it is not in most other sat images There is a lot of nuance there that is lost...Good luck and thanks for your work!

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

                          @setvak
                          @TZ
                          I fully understand the reason you use this color palette (240-200K).
                          Is it possible to have the ability to read (using the picker) the cloud top temperature ?
                          It would be very usefull for pilots (and aviation meteorologists) to know the temperature,
                          for computing the cloud top height. So, they will know (during the climb phase) the height they will be "on top".
                          Thank you again and congats for this new big feature.

                          1 Reply Last reply Reply Quote 3
                          • Tomber42T
                            Tomber42 Moderator @djare
                            last edited by

                            @djare

                            @djare said in Help us to test new Satellite layer:

                            5 min step, as well as some next 60 min prediction, would be very usefull

                            I don't think that prediction is available from EUMETSAT

                            Greetings from Tomber

                            1 Reply Last reply Reply Quote 2
                            • Tomber42T
                              Tomber42 Moderator @jmh2002
                              last edited by

                              @jmh2002 said in Help us to test new Satellite layer:

                              WOW that's awesome!!!

                              THANKS to Ivo, Milan, Tomas, Martin, Jakub, Jindra, and all of the Windy Team!

                              Yeah, this layer is absolutely amazing. :) THX to WINDY Team

                              Greetings from Tomber

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

                                this came out phenomenal - really useful!

                                Michael

                                1 Reply Last reply Reply Quote 2
                                • Vladimir ZovV
                                  Vladimir Zov
                                  last edited by

                                  Damn this is so coool. Can't stop watching the animation of clouds, too hypnotizing _ And quality is awesome!

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

                                    Hi
                                    I have a suggestion
                                    Merge the rain radar image with the satellite of clouds in one map

                                    1 Reply Last reply Reply Quote 4
                                    • TalkeetnaAirTaxiT
                                      TalkeetnaAirTaxi
                                      last edited by

                                      Aw! Those of us in Talkeetna, AK, are in the "V" of no coverage :(

                                      mhaberlerM TZT 2 Replies Last reply Reply Quote 0
                                      • B
                                        bearfoot
                                        last edited by

                                        This is great

                                        1 Reply Last reply Reply Quote 0
                                        • L
                                          Leslie_Slone
                                          last edited by

                                          I Like the new edition to the site. Keep up the good work. I use this site more than any other to keep an eye on the weather and I used it to track Hurricane Michael. I live in FL thanks for the site. The Weather Chanel has removed their Hurricane Center from the web site.

                                          1 Reply Last reply Reply Quote 1
                                          • T
                                            tereplane
                                            last edited by

                                            I love it .... True Forecasting, Real Weather. That's Windy

                                            1 Reply Last reply Reply Quote 2
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