What makes a thunderstorm severe? - KTRE.com | Lufkin and Nacogdoches, Texas

What makes a thunderstorm severe?


  • The National Weather Service defines a thunderstorm as severe if the storm produces hail at least 3/4-inch in diameter, wind speeds of 58mph or greater, or tornaodes. 
  • Of the estimated 100,000 thunderstorms that occur in the United States every year, only about 10 percent are classified as severe.
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