A derecho - a large, long-lived line of fast moving, violent thunderstorms - is headed towards the Washington, D.C. metro region...posted by schmod at 4:31 PM on June 29, 2012
As the line moves through, wind gusts up to 80 mph are possible. This derecho has a history of producing damaging winds of 70-90 mph from Chicago through Columbus. Some hail is also possible. Dangerous lightning and torrential rain will also likely accompany these storms...
This derecho produced a 91 mph wind gust in Fort Wayne, Indiana and 72 mph gust in Columbus. The storm has knocked out power to more than 280,000 customers in Ohio and produced significant damage. Over 200 wind damage reports have occured from this storm complex from Illionis to Ohio.
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posted by postel's law at 12:58 PM on June 29, 2012 [1 favorite]