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Apr. 17, 1964, from 0020 to 0125 CST.
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Fig. 5—Time cross sections of total beta concentration (solid lines),
rainfall rate (lines with x’s), and ratios of particulate to dissolved beta
activity (lines with zeros) for station 1 for storm of Apr. 17, 1964.
centration, but, when the rainfall rate became very weak, the beta
activity in the rain samples was at a maximum forthat station. A
comparison of the Fig. 5 with the Fig. 6 time cross sections of radarecho intensity and storm height shows that rainfall did not occur until
the radar-echo intensity and storm height over the station were at