SUMMARY TABLE - Typical Raindrop Sizes
Drop Size Terminal Velocity
Rain Type mm in m/sec miles/hr
Light Stratiform Rain (.04'' per hour)
Small Drop .5 .02 2.06 4.6
Large Drop 2.0 .08 6.49 14.4
Moderate Stratiform Rain (.25'' per hour)
Small Drop 1.0 .04 4.03 8.9
Large Drop 2.6 .10 7.57 16.1
Heavy Thundershower (1.0'' per hour)
Small Drop 1.2 .05 4.64 10.3
Large Drop 4.0 .16 8.83 19.6
Largest Possible Drop 5.0 .20 9.09 20.2
Hailstone 10 0.4 10.0 22.2
Hailstone 40 1.6 20.0 44.4
Copyright 2008, Steven L. Horstmeyer, all rights reserved.
CLICK HERE FOR MORE ON WHY 5MM IS THE LARGEST POSSIBLE DROP SIZE

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.


USE THE "BACK" BUTTON TO GO BACK