National Weather Service United States Department of Commerce

Event Summary

A strong line of thunderstorms that developed over North Dakota and southern Manitoba during the evening hours of Wednesday, July 20th, reached western Upper Michigan during the early morning hours of Thursday, July 21st. The line continued eastward through the morning, clearing eastern Upper Michigan by early afternoon. Very strong winds accompanied the line of storms across the northwest half of Upper Michigan. Several pockets of extensive wind damage were observed across Ontonagon and Houghton counties, with sporadic damage elsewhere along the line. This includes estimated winds of up to 90mph at the Emily Lake Campground south of Twin Lakes in Houghton County based off an NWS storm survey.


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