Dave Dildine, wtop.com

WASHINGTON – The severe windstorm that roared southeast from the Great Lakes into the Mid-Atlantic in June was an extreme weather event for the Washington, D.C. metro area. The storm system left extensive tree damage in its wake and more than one million people were without power.

The storm complex was a “derecho.” Although the intensity of the June storms was exceptional, it’s happened before.

A derecho of similar speed and intensity struck the region the afternoon of June 4, 2008. Like June 2012’s windstorm, the