This photograph shows the build-up of cumulus clouds.
Click on image for full size
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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