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    Why is Wind speed in hurricanes so wrong?

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    • Ricky_Lightning
      Ricky_Lightning @conduit last edited by

      @conduit I am neither qualified nor remotely intelligent enough to appreciate your invitation to understand the math! Hee Hee. Cheers anyway.

      Jamo@illumen8.co.uk

      1 Reply Last reply Reply Quote 0
      • Ricky_Lightning
        Ricky_Lightning @conduit last edited by

        @conduit It would be a good idea for someone knowledgeable about the mechanics behind this app to produce a Q&A page answering the most sought after questions/functionality

        Jamo@illumen8.co.uk

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        • Ricky_Lightning
          Ricky_Lightning @chibimaddy last edited by

          @chibimaddy Firstly - Good Luck these next few days from Me & mine to U & U'rs. I hope to see you back here in the next few days discussing the joys of Windy.com

          Jamo@illumen8.co.uk

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          • Ricky_Lightning
            Ricky_Lightning @cape last edited by

            @cape I am in total agreement with you there. It's got loads of functions and looks great too. Pro version?

            Jamo@illumen8.co.uk

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            • Gabou971
              Gabou971 Moderator @Siff last edited by

              @Siff

              Hello, I'm in Sint-Maarten and I survived Irma (My house didn't). REAL wind values have been constantly updated, thanks to NOAA planes flying through the hurricane constantly. They are today the only way to give us real wind data during such storms (because instruments on the ground fly away). During the peak intensity just before Irma hits sint maarten, they measured 225 mph wind gusts in the eyewall of the hurricane, and sustained wind of 185 mph. We had an anemometer here in Grand-Case airport. the last wind gust measured by the instrument before it broke was 135 mph 2 hours before the eyewall. Everything is destroyed here.

              Models like GFS and ECMWF cannot predict hurricane winds, especially close to the eye, where the wind is the strongest, because the resolution scale of these models is not wide enough (this is the main reason to me). In the front of the hurricane, there is northerly wind with strong updrafts, 7 kms away, in the eye there is no wind and a strong downdraft, and the 7km away there is a strong southerly wind with updrafts again ! All of that with huge changes in pressure. It's so powerful in a so small area ! That's why they created the Hurricane Weather Research and Forecasting model(HWRF). It is the only model using recon aircraft data, satellite imagery and buoys data at the same time !!! And it is the more precise model to predict hurricane wind direction and force (not the path of the hurricane).

              So, regarding wind force and direction, the more you are close to the eye, the more GFS and ECMWF model will be inaccurate. But these models are better to predict the path of hurricanes, they work well on bigger scales !

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              • A
                Anat-Aimee @Siff last edited by

                @Siff I am questioning the reasons for the HUGE discrepancy between the supposed wind speeds proclaimed by "The Weather Channel",(150-165 mph), and those which are found on the "Windy" graph.
                Something is not Kosher here.
                Florida is Not being "whipped" by category 5 hurricane winds.

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                • A
                  Anat-Aimee @georgewells last edited by

                  @georgewells The only possibility is a mix- up in kilometer/ mile usage .
                  That would make SOME sense of it.

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                  • jmh2002
                    jmh2002 Moderator Mariners - Seafarers Sailor last edited by jmh2002

                    Please see many other threads regarding this subject, including this recent one:

                    https://community.windy.com/topic/9456/dorian-wind-speed-and-pressure/2

                    And the detailed discussion here:

                    https://community.windy.com/topic/4415/why-is-wind-speed-in-hurricanes-so-wrong

                    Additionally, Windy does not create any forecast data but instead only visualises forecast and actual data received from various third party providers.

                    There are many useful but also complex and expert level tools and data available via Windy, therefore the user must always take care:

                    • To understand what information they are displaying and viewing
                    • To understand from where and when the information was sourced
                    • To understand what this information actually means.

                    Comparing Forecast data with Actual data can be a common mistake.

                    Around 1300 UTC on Monday 02 Sept the Windy Hurricane Tracker was reporting wind speeds of 142kn / 164mph / 264kph for Hurricane Dorian.

                    Hope this helps :)

                    WINDY is everywhere :)

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                    • jmh2002
                      jmh2002 Moderator Mariners - Seafarers Sailor last edited by jmh2002

                      @Anat-Aimee One of your posts has been flagged for moderation and deleted.

                      Political posts, conspiracy theories, etc, are not acceptable here on the Windy forum.

                      Please see the FAQ here: https://community.windy.com/topic/8680/political-topics-posts-are-not-acceptable

                      WINDY is everywhere :)

                      matemorotz 1 Reply Last reply Reply Quote 1
                      • matemorotz
                        matemorotz @jmh2002 | Premium last edited by

                        Irrelevant if there is 200mph or 300mph, but it's really important if it's under 10, 20 or 40 knots...

                        Windy is top!

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