Used formula:
When Tw850 ≥ 9°C
ffx = 15.9 + 0.174 * U850 * sqrt(Tx - Tw850) + 0.057 * U250 * sqrt(Tx -
Tw850) + 0.92 * (Tw850 - Tw500)
When Tw850 <9°C
ffx = 14.9 + 0.976 * U850 + 1.27 * (Tw850 - Tw500)
(Tx = Tmax in °C, Thetaw = Tw850 in °C, U =
windspeed in kt, ffx = max. gust in kt)
Source:
Ivens, A.A.M. Forecasting the maximum wind velocity in squalls.
Proc. Symp.& Mesoscale Analysis & Forecasting, Vancouver, Canada, 17-19
August 1987, ESA SP-282 (August 1987)
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