EF0 tornado in Walworth County, Wisconsin
Tornado April 17, 2026 · Walworth County, Wisconsin
The path drawn at its surveyed width of 50 yards (0.03 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.
What the National Weather Service wrote
The tornado began along Spring Prairie Rd and moved to the southeast. The tornado had an intermittent path with a few trees uprooted, some shingles peeled from the south side of a roof, another roof peeled back on the southeast corner, and siding damage to a garage. The track continued to the southeast with several limbs snapped from the tops of trees, ending near Old County Highway DD north of Highway 11.
The wider storm
A round of severe thunderstorms and flash flooding occurred as a strong cold front approached and tracked across southern WI. More specifically, supercell thunderstorms developed from northeast IA into southwest WI and far southern WI during the late afternoon and evening hours. Eventually these storms transitioned to a squall line which had a number of tornadoes associated with it, as it tracked through southeast Wisconsin. Flash flooding affected much of the same region especially in Janesville. Many large hail reports and a small number of downburst damaging wind reports were also received.
Began near Lyons Arpt (42.6982, -88.3661).
Other tornadoes from the same storm system
6 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 1329355. Narratives are written by the National Weather Service forecast office that issued the report.
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