Frequency Distributions of Shower Sizes

Abstract

The number per unit area of radar echoes from isolated showers, as a function of echo radius r, is found by analysis of data from several localities to he proportional to exp (−βr), where β varies with time and place inversely as the intensity of convective activity. Calculated values of β range from 0.8 (n mi)−1 for intense convection to 1.7 (n mi)−1 for light shower activity occurring in trade-wind cumuli.