What is a severe thunderstorm?
A thunderstorm is classified as “severe” when it contains one or more of the following: hail one inch or greater, winds gusting in excess of 50 knots (57.5 mph), tornado.

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1. What is a thunderstorm?
2. What is a severe thunderstorm?
3. What is a severe thunderstorm watch?
4. What is a severe thunderstorm warning?
5. What kinds of damage can thunderstorms cause?