National Weather Service United States Department of Commerce

Severe Thunderstorms July 18-19, 2020

A line of strong to severe thunderstorms moved across nearly all of Upper Michigan in the late night hours of Saturday July 18 and into the early morning hours of Sunday July 19.

Significant wind damage was observed in a narrow west-to-east swath from near Nisula, through Alston, Pelkie, Baraga, L'Anse, and Pequaming. Straight-line winds estimated at 90-100 mph in this narrow corridor caused a barn to collapse and other roof damage near Nisula, and a roof to be torn off a home in Pequaming. This segment of the line later produced a 76 mph wind gust at Stannard Rock in Lake Superior.

Other less significant wind damage was scattered throughout western and central Upper Michigan. Widespread power outages and numerous snapped or uprooted trees were reported throughout Gogebic, Ontonagon, Houghton, Baraga, and Marquette counties. One injury was reported in Marenisco when a tree fell onto a vehicle that was occupied at the time.

Heavy rainfall also accompanied these storms, with widespread reports of 1-2" of rain. This rainfall caused localized shoulder and trail washouts, but no major flooding was observed.

Estimated peak wind gust speed from this line of thunderstorms

Click this link for a complete list of reports of wind damage and heavy rainfall from this event.

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