North American Derecho
The June 2012 Derecho was one of the most damaging thunderstorm complexes in recent history. This surprise storm produced wind speeds over 90 mph and hail stones up to 2.75 inches in diameter. From the afternoon of June 29 into the early morning of June 30, the Derecho traveled from Indiana, across the Midwest, and into the Mid-Atlantic states. The storm caused 22 deaths and widespread damage across its 800-mile track. Downed trees and flooded roads cut off aid to many parts of hard-hit West Virginia. The Derecho also left millions without power during the June-July heat wave.