AFWA Gust Calculator
The maximum convective downdraft is computed in 2 ways:
V1 = 13 * sqrt(T1) V2 = V + (13 * sqrt[(T1+T2)/2])
Enter values for the following variables, then click Calculate. T1: To determine T1, first answer the following questions: Is there an inversion? Yes No
TMAX = max t = (°C) T2 = mixing ratio at melting level = (°C) V = mean wind speed (kt) in the lowest 5,000 feet = (kt)
V1 = = maximum wind gust (knots) V2 = = maximum wind gust (knots)