
%0 Journal Article
%A Radok, U 
%T A Remarkable Thunderstorm Flight Record
%J Australian Journal of Chemistry
%D 1949/12/01
%V 2
%N 4
%P 550-563
%K 
%R https://doi.org/10.1071/CH9490550
%U https://www.publish.csiro.au/paper/CH9490550 
%X The barogram of a sailplane flight in a thunderstorm at Benalla, Victoria, shows a descent from an altitude of 12,400 ft. to the sulfate at velocities exceeding 300 ft./sec. over a large part of that height range. The record and the meteorograph used were examined In detail, without definite evidence of instrumental failure. Flight trials gave 100 ft./sec. as maximum descent velocity for the sailplane, while the aerological conditions suggest an upper limit of 130 ft./sec. for the downdraft itself. In comparison with similar data obtained in Florida thunderstorms the lognormal distribution of these data is used to estimate the probability of various large downdraft velocities. 
