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EF1 tornado in Walworth County, Wisconsin

Tornado April 17, 2026 · Walworth County, Wisconsin

EF1
Rating
2.7 mi
Path length
75 yd
Path width
$99K
Damage as recorded
EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 75 yards (0.04 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

Tornado appeared to begin along Turtle Creek west of Klug Rd and south of County Road M. The tornado destroyed an open facing barn shed along Klug Rd. It then tracked to the northeast and caused damage to 3 barns, a garage and a house along County Road P. It then continued to the northeast and crossed Dam Rd before ending near Turtle Creek again.

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 Delavan (42.6509, -88.6897).

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 1329352. Narratives are written by the National Weather Service forecast office that issued the report.

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