EF1 tornado in Green Lake County, Wisconsin

A brief, weak tornado spun up in a rural area southeast of Manchester, and uprooted or damage trees, pulled a roof off a pole shed, damaged the overhang and roofing of a residential home's garage, and damaged a part a small part of another home's roof. This tornado spun up just southeast of Lake Maria, and moved east-northeast across CTH O about 1/2 mile north of the county line, and then dissipated in open fields. Some corn crop was also damaged. The starting and ending lat/long pairs of numbers were: 43.63654/-88.98887 and 43.64454/-88.96897. DI#2 (FR12), DOD4. Winds were estimated at 97 mph, and the average path width was about 40 yards.

This episode was the 2nd round of severe storms over southern Wisconsin on July 7th. A line of storms moved west to east across southern Wisconsin during the evening hours. Powerful thunderstorm downburst winds were generated which knocked down trees and power-lines that left about 23,000 customers without electrical power. Additionally, one isolated tornado spun up on the leading edge of the line of storms in southern Green Lake County, where a microburst pushed ahead and enhanced local vorticiy/rotation in a storm cell. The storms were associated with a short-wave trough at 500 MB moving east through Wisconsin, with a 30 knot low-level jet at 850 MB. Surface temperatures were in the 80s and surface dewpoints werer around 70.