1960•Bulletin of the American Meteorological SocietyRequires access
A Probability Factor for Thunderstorm Warnings 1
Guy A. Franceschini
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Abstract
An objective method is suggested which will enable forecasters to determine a direct probability-of-occurrence factor to be included with thunderstorm warnings. The method is based on radar observations and employs a simple grid overlay. The fractional area of the radar scope covered or traversed by thunderstorm echoes is used to determine the probability factor.