Friday, April 15, 2016

What is a Derecho?

Essentially, a derecho is a long-lived, rapidly moving line of intense thunderstorms that produces widespread damaging winds in a nearly continuous swath.

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Gust front "shelf cloud" (or "arcus") on the leading edge of a derecho-producing convective system. The photo was taken on the evening of July 10, 2008 in Hampshire, Illinois as the storm neared the Chicago metropolitan area.

Animation compiled by researchers at CIMMS showing how a derecho looks like on satellite. Viewed by satellite, derechos present an extensive cloud shield produced by the strong updrafts of the thunderstorms comprising a derecho.

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