
TY  - JOUR
A1  - Radok, U 
T1  - A Remarkable Thunderstorm Flight Record
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1949
VL  - 2
IS  - 4
SP  - 550
EP  - 563
KW  - 
UR  - https://doi.org/10.1071/CH9490550 
N2  - 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. 
ER  -

