National Weather Service United States Department of Commerce


After roughly a week of eventful severe weather across portions of southeast Michigan initially characterized by large hail, a complex system of multicell and discrete thunderstorms brought another round of severe weather mainly south of the M-59 corridor (and especially south of I-94) beginning during the evening hours of June 20, 2021 and extending into the early morning hours of June 21, 2021. Numerous reports of wind damage were received, with multiple trees down in the hardest hit areas of Lenawee, Monroe, Wayne, and portions of Oakland counties. The damaging wind, estimated at 50-60+ mph in strength, resulted in at least 60,000 power outages across portions of southeast Michigan. The severe thunderstorms occurred south of a stationary boundary draped near the I-94 border, with a moist and unstable boundary to the south of it across far southern Lower Michigan into the northern Ohio Valley.

In addition to the numerous wind reports, the first tornado of 2021 occurred in Riga Township, located in far southeast Lenawee county. This was the first tornado in southeast Michigan since September 2019 in Sanilac county. The Riga tornado was rated EF-1 with estimated peak winds of 90 mph and a path length just shy of 3 miles. The tornado damaged at least 5 homes, 4 outbuildings, 3 barns, and numerous trees. Some highlights of the damage included snapped large tree limbs, roof loss, collapsed barn walls, and a destroyed small sheet metal silo. The tornado was the first in Lenawee county since an EF-1 tornado that occurred northwest of Adrian back on June 6, 2010.


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