Thunderstorm Wind — Lenawee, Michigan

2021-08-12 · near Cambridge Jct, Lenawee, Michigan

Event narrative

Several trailers turned over and numerous trees down at Jupiter Campground near Michigan International Speedway.

Wider weather episode

Two rounds of thunderstorms impacted Southeastern Michigan on August 11: the first during the afternoon and the second during the late evening into the following morning. The first round produced widespread severe wind gusts across the area between 3 and 5pm as a well-organized line swept eastward across the state. This line knocked out power for hundreds of thousands of customers as widespread tree and power line damage occurred. A wind gust of 75 mph was measured in Mt. Clemens. A lull in activity followed for much of the evening before the next round of storms tracked eastward across the region after 10pm. Severe reports were more isolated with this round, but abundant moisture moved in and led to repeated rounds of training thunderstorms that resulted in prolonged heavy rain and flooding overnight. Flash flooding occurred over Livingston and Macomb Counties where some areas saw 3 to 5 inches of rain. Additional severe storms occurred the early morning of the 12th along and south of the I-94 corridor before storms finally moved out. According to DTE and Consumers Energy outage reports, nearly 850,000 customers across the state lost power due to the storms.

View location on OpenStreetMap → (42.0560, -84.2560)

Source: NOAA Storm Events Database, event_id 979936. Narrative written by the NWS forecast office that issued the report.