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    Description of weather overlays

    Frequently Asked Questions
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    • KorinaK
      Korina @auweatherwatcher
      last edited by

      @auweatherwatcher Hello, the certificate error should not happen again.

      Korina

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      • V
        vschmidt @Meridies
        last edited by

        @meridies Indeed, this is listed in the Description of Weather Overlays post, but maybe one detail could be clarified.

        Waves is described as:

        Waves: Significant wave height and its period of all wave types combined (swell and wind waves). Close to the shoreline, the actual height is influenced by the shape of the sea bottom.
        

        It would be useful to know how the math used to combine "significant wave height and period its period" from wind and several different sources of swell. The resulting calculation could be very misleading and, in fact, an inspection of these values in Windy is confusing.

        For example, as I inspect a point now, I see wind waves listed as 1.0 m, swell 1 at 0.6m and swell 2 at 0.7 m. But the total "wind" value provided in the annotation within the map is 1.2 m. How this is arrived at is unclear.

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

          @vschmidt
          This thread may answer your first question:
          https://community.windy.com/topic/3603/different-definitions-for-the-wave-periods-are-shown
          And this article too:
          https://confluence.ecmwf.int/plugins/servlet/mobile?contentId=131397261#content/view/131397261

          Concerning your example, what do you mean with ‘the total "wind" value’ ?
          If you mean the Wave overlay, it corresponds effectively to the ‘total sea’:
          https://community.windy.com/topic/17449/swell?_=1640701282822

          1 Reply Last reply Reply Quote 2
          • luigitrevisiL
            luigitrevisi Photographer | Premium
            last edited by

            Would it be possible to have these kind of information in an ad hoc page? Even better if it's shown as a detail when selecting an overlay.

            Luigi

            KorinaK 1 Reply Last reply Reply Quote 0
            • KorinaK
              Korina @luigitrevisi
              last edited by

              @luigitrevisi Hello, descriptions are already available on desktop and in the app under the "i" symbol.

              Screenshot 2022-02-07 at 8.26.34.png

              Korina

              luigitrevisiL 1 Reply Last reply Reply Quote 1
              • luigitrevisiL
                luigitrevisi Photographer @Korina | Premium
                last edited by

                @korina Oh cool! I missed that part, thank you!

                Luigi

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                • RodnoR
                  Rodno
                  last edited by

                  setting temperature off in menu but not clearing. Location set and is marked, goes there when pressed from upper left button, but misadjusts so unknown way especially when pulling day states. Goes to an unselected location.
                  thx

                  KorinaK 1 Reply Last reply Reply Quote 1
                  • KorinaK
                    Korina @Rodno
                    last edited by

                    @rodno Hello, what issue do you have exactly?

                    Korina

                    1 Reply Last reply Reply Quote 1
                    • D
                      desianasw @Yves70
                      last edited by

                      @yves70 hi, just wanna ask when the weather symbol is cloudy or sunny cloudy but the forecast said that there are 4.2 mm of rain. How did it happen? please help me to understand it. thankyou

                      KorinaK 1 Reply Last reply Reply Quote 0
                      • KorinaK
                        Korina @desianasw
                        last edited by

                        @desianasw Hello, can you show an example please?

                        Korina

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                        • F
                          fooika1972 @ivo
                          last edited by

                          @ivo

                          I am wanting to know why it’s literally zero knts out but windy days it’s 14? I paid to have the hourly updates. Never using windy again. Useless

                          KorinaK 1 Reply Last reply Reply Quote 0
                          • KorinaK
                            Korina @fooika1972
                            last edited by

                            @fooika1972 We are not able to analyze your complain without details. Please provide details about the location and observed issue.

                            Korina

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                            • P
                              Peter Bayfield | Premium
                              last edited by

                              What does the blue arrow next to my location indicate. It revolves to different direction as I rotate my smartphone.

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

                                @Peter-Bayfield
                                This blue arrow indicates nothing. Just forget it.

                                1 Reply Last reply Reply Quote 0
                                • lotayah446L
                                  lotayah446
                                  last edited by

                                  @gjwolfswinkel said in Description of weather overlays:

                                  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?

                                  The freezing altitude layer or the freezing level is a meteorological term that refers to the altitude in the atmosphere where the temperature is at or below freezing (0 degrees Celsius or 32 degrees Fahrenheit). The altitude at which the freezing level occurs can vary depending on the temperature profile of the atmosphere, and it can be affected by factors such as atmospheric pressure, humidity, and wind.

                                  In the context of skiing weather reports, the freezing level or freezing altitude is an important parameter to consider because it determines whether precipitation will fall as snow or rain at different altitudes. If the freezing level is high, then precipitation will fall as rain at lower altitudes, which can result in unfavorable ski conditions. On the other hand, if the freezing level is low, then precipitation will fall as snow at lower altitudes, which is generally more desirable for skiing.

                                  1 Reply Last reply Reply Quote 1
                                  • asif ali 10A
                                    asif ali 10
                                    last edited by

                                    How does weather overlay work?

                                    As a weather overlay, the navigation chart, fishing chart, and perspective 3D view can all be layered on top of each other to display information related to weather and weather conditions. Depending on the chart, both the navigation chart and the fishing chart can be displayed with weather radar, cloud top heights, lightning, weather buoys, county warnings, and hurricane warnings.

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                                    • emilyyyZzzE
                                      emilyyyZzz | Premium
                                      last edited by

                                      Is there any description or any more information on the Satellite overlay with BLUE, VIS, and IR lenses? Apologies if already asked.

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                                      • M
                                        mrp 2
                                        last edited by idefix37

                                        Screenshot_20230524_152805.jpg

                                        You make it rain in my place!! And there is terrible sun and clear sun

                                        idefix37I 1 Reply Last reply Reply Quote 0
                                        • idefix37I
                                          idefix37 Sailor Moderator @mrp 2
                                          last edited by idefix37

                                          @mrp-2

                                          Windy does not make rain !
                                          The layer that you show is the forecast of lightning per sq .km (l/km2). It just predict a possibility of thunderstorms.

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                                          • Gkikas LGPZG
                                            Gkikas LGPZ Moderator
                                            last edited by

                                            @asifnaveed8527
                                            For history of numerical weather prediction
                                            https://en.wikipedia.org/wiki/History_of_numerical_weather_prediction

                                            For the future ...
                                            https://www.technologyreview.com/2023/07/11/1076067/weather-forecasting-is-having-an-ai-moment/

                                            1 Reply Last reply Reply Quote 2
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