• The front edge of a derecho rolling over open fields in Iowa, U.S. In meteorology, we are all familiar with the destructive force of hurricanes, tornados, and flooding.
  • Composite radar image of the June 2012 North American derecho (a progressive derecho) as it moved from Indiana to Virginia.
  • There are a few criteria that need to be met for an event to be classified as a derecho ... A derecho starts life as a thunderstorm, or cluster of thunderstorms.
  • Although a derecho can produce destruction similar to the strength of tornadoes, the damage typically is directed in one direction along a relatively straight swath.
  • A derecho can be as destructive as a weak to moderate tornado, but the damage is mainly the result of straight-line rather than rotating winds.
  • On August 10, 2020, a derecho swept across the Midwest from South Dakota to Ohio, traveling 770 miles in 14 hours and knocking out power for more than a...
  • Tornado formation is less common in a progressive than serial type. Hybrid derecho – A derecho with characteristics of both a serial and progressive derecho.
  • What is a Derecho?
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  • A derecho is a widespread wind event that can cause significant damage for hundreds of miles. They're most common May through August, and they can be deadly.
  • This document provides facts about windstorms called derechos and shows examples of major derecho events that have occurred in North America.