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    Wind speed in tropical cyclones

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    • auweatherwatcherA
      auweatherwatcher | Premium
      last edited by

      Just wondering how the wind speeds inside a tropical cyclone ( hurricane) are calculated different to the wind gust picker. Like it shows 209km/h but I can't see it show, it gets about to a max of 170-180km/h like hereScreenshot 2023-08-30 at 8.45.06 pm.png

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

        @auweatherwatcher

        This is because the global models can’t accurately forecast the wind speed near the eye wall of a hurricane / typhoon where the wind is the strongest. For this reason the specialised centers RMSC don’t rely on these models for the wind speed even if they are quite good to predict the hurricane path. The NHC for instance uses special models, but in addition and above all the Dvorak technique based on satellite views and on airborne recon.
        Even if ECMWF is not a RMSC, they provide a Tropical track forecast that you see in Windy. The model of the ECMWF, in reality named IFS or HRES, has been improved to predict better wind speeds in Tropical cyclones. See all details:
        https://www.ecmwf.int/en/newsletter/164/meteorology/enhancing-tropical-cyclone-wind-forecasts
        However the Tropical Cyclones track feature is based on additional parameters and calculation:
        https://charts.ecmwf.int/products/cyclone?base_time=202308300000&product=tc_strike_probability&unique_id=13W_HAIKUI_2023

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