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    Windy launches Satellite layer

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    • TZ
      TZ Administrator last edited by

      @Gkikas-LGPZ @csabatatar It is visualisation of low temperatures - peaks in IR10.8 channel. So information is the same as in Infra, but Infra+ has additional colour palette.

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

        @TZ
        is there a color scale? e.g. blue < -20C, red < -30C etc

        It would be great if the picker shows (cloud top) temperature
        19829085-4384-45ac-b527-7f3af21840ae-εικόνα.png

        setvak TZ Cros MDason 4 Replies Last reply Reply Quote 8
        • 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
          • idefix37
            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
            • setvak
              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 LGPZ 1 Reply Last reply Reply Quote 13
              • iz5bxf
                iz5bxf | Premium last edited by

                Simply Fantastic

                1 Reply Last reply Reply Quote 4
                • Gkikas LGPZ
                  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)

                  setvak 1 Reply Last reply Reply Quote 1
                  • setvak
                    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
                    • TZ
                      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.

                      setvak 1 Reply Last reply Reply Quote 2
                      • setvak
                        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 LGPZ 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

                          Tomber42 1 Reply Last reply Reply Quote 0
                          • C
                            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 LGPZ
                              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
                              • Tomber42
                                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
                                • Tomber42
                                  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
                                  • mhaberler
                                    mhaberler | Premium last edited by

                                    this came out phenomenal - really useful!

                                    Michael

                                    1 Reply Last reply Reply Quote 2
                                    • Vladimir Zov
                                      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
                                      • jamil
                                        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
                                        • T
                                          TalkeetnaAirTaxi last edited by

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

                                          mhaberler TZ 2 Replies Last reply Reply Quote 0
                                          • B
                                            bearfoot last edited by

                                            This is great

                                            1 Reply Last reply Reply Quote 0
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