(found in significant numbers) SUMMARY TABLE - Typical Largest Cloud Drop Sizes
Largest Drop Size Updraft Velocity to Keep Drop Aloft
Cloud Type mm in cm/sec miles/hr inches/sec
Cumulonimbus 0.076 0.003 9 0.20 3.52
Towering Cumulus 0.067 0.003 6 0.13 2.29
Fair Wx Cumulus 0.016 0.0006 0.4 0.009 0.16
Altocumulus 0.010 0.0004 0.2 0.004 0.07
Stratocumulus 0.008 0.0003 0.07 0.002 0.03
Nimbostratus 0.043 0.002 5 0.11 1.94

Sources:
R.R. Rogers, A Short Course in Cloud Physics, 2 ed. Pergamon Press, 1979
H. Byers, General Meteorology, 3 ed.McGraw-Hill, 1959
H.R. Pruppacher, Microstructure of Atmospheric Clouds and Precipitation,
in Clouds: Their Formation, Optical Properties and Effects, P. Hobbs and A. Deepak, eds.,Academic Press, 1981.

Copyright, 2008 Steven L. Horstmeyer, all rights reserved.
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