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Severe thunderstorms formed in Wisconsin ahead of a cold front and moved across Lake Michigan in the morning hours of Tuesday September 7th, 2021. A few reports of wind damage and trees down originated from gusts mainly between 45 and 50 mph. These storms were prolific hail producers, with a few 2.0” diameter stones in Cadillac. Some areas received multiple rounds of hail through the late morning and early afternoon, with many locations receiving pea-sized hail which completely covered the ground. In addition to hail and wind these storms also produced heavy rain, with many locations along and south of M-72 receiving between 1 and 2 inches. Roscommon county airport in Houghton Lake broke their daily rainfall record with 1.62” through the day. The storms grew into a line during mid-afternoon and pushed southeast out of the area. In total, 19 Severe Thunderstorm Warnings and 8 Special Marine Warnings were issued.

Radar loop of September 7th's thunderstorms
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