National Weather Service United States Department of Commerce

This Day In Weather History

In 1987, severe thunderstorms invaded the Northern Plains and Upper Great Lakes from Minnesota to Northern Lower Michigan. Parts of Central Wisconsin were whipped by 80 to 90 mph winds. The town of Mosinee was smacked by an 87 mph gust. Severe thunderstorm winds capsized 26 boats on Grand Traverse Bay where 2 women drowned. The thunderstorms were also prolific rain producers as 7 to 9 inches swamped much of Southern Minnesota. In Northwest Nebraska, Cherry County was pelted with golf ball sized hail that accumulated to a 1 foot depth. && In 1996, severe thunderstorms raked Mt. Rushmore with hail up to 2 inches in diameter and winds around 100 mph. There were between 300 and 500 people outside when the extremely powerful thunderstorms began. Considering the magnitude of the event, it's surprising only 15 were injured.