EF1 tornado in Rock County, Wisconsin
Tornado April 17, 2026 · Rock County, Wisconsin
NOAA records this tornado county by county. Its path ran through Rock County → Rock County; the totals above are for the whole tornado.
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 the National Weather Service wrote
Brief tornado that caused damage near Maple Lane southeast of Janesville. Storm chaser video confirmed a brief tornado in this area. More widespread damage occurred west and east of this track due to downburst winds.
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 Tiffany (42.6062, -88.9434).
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 1329343. Narratives are written by the National Weather Service forecast office that issued the report.
Tornadoes near your address
See every tornado that passed near a place you know, measured to its path.
We couldn’t get your location. Check that location access is allowed for this site, or type an address.