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The Winter 2010 issue of The Earth Scientist includes a variety of educational resources, ranging from astronomy to glaciers. Check out the other publications and classroom materials in our online store.
This photograph shows the build-up of cumulus clouds.
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Courtesy of Steve Albers

Types of Thunderstorms

There are two main types of thunderstorms: ordinary and severe. Ordinary thunderstorms are the common summer storm.

Ordinary thunderstorms last about one hour. Rain and small hail occur.

Severe thunderstorms are really dangerous. They can produce large hail, strong winds, intense rain, flash floods, and tornadoes. Severe thunderstorms can last several hours.



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