On the evening of July 12, 1995, continuing into the 13th, the “Right Turn Derecho” formed in eastern Montana and moved east to the Upper Peninsula of MI, and then veered south (hence the name “right turn”) and blasted across MI, Ontario and into OH, and PA. Millions of trees were blown down, dozens of structures were damaged or destroyed, seven people were killed, and at least 36 others were injured. Source.