EF0 tornado in Kenosha County, Wisconsin

An EF0 tornado developed north of Brighton, about 1/2 mile southwest of the intersection of County Line Road and 224th Avenue. This tornado moved northeast into southern Racine County across County Line Road, about 1,700 feet to the east of the intersection with 224th Avenue, and quickly intensified to EF-1 rating. A pole shed sustained minor roof and siding damage. Otherwise, damage was limited to mainly trees along the slightly more than 3/4 mile long path that averaged 75 yards wide. The EF0 estimated wind speed of 80 to 85 mph was based on DI 28(TS) DOD 4. The exact start location is Lat 42.66253 Lon -88.08841. The exact end location is Lat 42.66995 Lon -88.07447.

An out-of-season round of strong to severe, surface-based, thunderstorms developed in Southeast Wisconsin during the mid-afternoon of November 22nd, which resulted in two tornadoes. This severe weather was related to low pressure lifting northeast from southwestern to central Wisconsin which brought a warm front up into southern Wisconsin. Afternoon temperatures peaked in the lower to mid 60s In the counties of Walworth, Racine, and Kenosha, with dewpoints reaching the mid to upper 50s. Instability with the unseasonable warmth just south of the warm front, with surface based CAPE values between 500 J/kg to 1000 J/kg, allowed for the thunderstorm development. Strong lift associated with the right entrance region of a 50 to 60 knot mid-level jet, strong deep layer shear and steep mid level lapse rates allowed super-cell thunderstorms with rotating updrafts to fire up along and ahead of a cold front trailing south of the low. Strong low-level shear developed just south of the warm front which led to one tornado in Walworth County and the other from far northern Kenosha County into southern Racine County around Union Grove. About 3,000 customers lost electric power due to the tornadoes and accompanying thunderstorms.