National Weather Service United States Department of Commerce

June 29, 2012 Derecho

It has been 10 years since the derecho impacted the Mid-Atlantic region. Widespread damage was observed across nearly the entire area. This included observed wind gusts up to 80-85 mph. Read More >

May 17, 2011 Severe Weather


Storm Survey Results: - Click on the location in the table for more information!



Location Start/
End Time
Event Type Path Length Path Width
Frederick County
May 17
5:35 pm-
5:39 pm
EF-0 Tornado
75 mph
1.1 mi 50 yds
Washington County
May 17
8:10 pm-
8:15 pm
EF-1 Tornado
90 to 100 mph
2.1 mi 200 yds

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