EF0 tornado in Marathon County, Wisconsin

A tornado developed about 2 miles north of Hamburg at 6:08 pm CDT (1708 CST) and moved northeast into Lincoln County at 6:10 pm CDT (1710 CST). Pine trees were uprooted and large branches were broken in the path of the storm (DI 28, DOD 2-3). A house sustained damage to its siding (DI 2, DOD 2) and several barns were blown down or lost their roofs (DI 1, DOD 2-3). The average width of the tornado in Marathon County was 100 yards. The tornado reached EF3 intensity in Lincoln County.

Thunderstorms developed along and ahead of a cold front as it encountered moist and unstable air across Wisconsin.

A record number of tornadoes for April struck Wisconsin on April 10. Fifteen twisters affected the state as a strong spring storm moved across the western Great Lakes. In the National Weather Service Green Bay service area of northeast Wisconsin, ten tornadoes were reported, a record single-day outbreak for any month of the year.

In addition to the tornadoes, the lines of thunderstorms that developed produced plenty of straight line wind damage and large hail. Wind gusts, some estimated in the 80 mph to 100 mph range, downed numerous trees, damaged a small building, caused an injury and damage to two homes, toppled an 80-foot tall radio tower, threw a carport two houses away, and caused major damage to two industrial buildings. The largest hail reported was baseball size near Winneconne in Winnebago County.