A total of 9 tornadoes are a part of the SPC Database for September 3, 1980. Four were in Stearns County, MN with the strongest an F3 that skipped from 5 miles SW of St. Cloud, passing through the city and lifting NE of town. There was tremendous damage at Bel Clare Acres. 13 mobile homes were destroyed and there was 1 fatality: A 15-month-old girl.
6 tornadoes were confirmed on September 2, 2002, all in the state of Wisconsin. There were 2 F0s, 2 F1s, 1 F2 and 1 F3. We take a look at that F3 in this summary. The tornado struck around 420pm on Labor Day 2002 just to the west of downtown Ladysmith.
A significant tornado traveled through parts of Butler and Bremer Counties in Iowa on September 1, 1961. There is limited information in the Storm Data entry about this event. It only states the movement to the ENE ending in NW Bremer County and losses were over $1,000,000.