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12 July 2011

Folks in The Windy City Learn What A Derecho Is

The official definition of a derecho from the AMS Gloassary: derecho—A widespread convectively induced straight-line windstorm. Specifically, the term is defined as any family of downburst clusters produced by an extratropical mesoscale convective system. Derechos may or may not be accompanied by tornadoes. Such events were first recognized in the Corn Belt region of the United States, but have since been observed in many other areas of the midlatitudes. Johns, …

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