Super Derecho Thunderstorm Line Kills 10 People in Midwest, Mid-Atlantic States

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More than 450 damaging wind reports were received by NOAA’s Storm Prediction Center (SPC) Friday and Friday night. The line passed through Chicagoland from about 11:00 a.m. to noon Friday becoming more severe as it headed toward the eastern states.

Fort Wayne, Indiana — 91 mph
Tuckerton, New Jersey — 81 mph

Falling trees are responsible for most of the deaths. One tree fell into a house in Springfield, Virginia and killed a 90-year-old woman while she was in her bedroom.

Only one unconfirmed report of a tornado was reported in Newcomerstown, Ohio.

A derecho is a widespread and long-lived, violent convectively-induced straight-line windstorm that is associated with a fast-moving band of severe thunderstorms in the form of a squall line. The storms are usually indicated on radar by a bow echo.

Derechos and associated thunderstorms occur mostly in summer, especially June and July in the United States. Derechos can occur at any time of the year and occur as frequently at night as during daylight hours.

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