Flood in Jefferson County, Wisconsin
Flood April 17, 2026 – April 30, 2026 · Jefferson County, Wisconsin
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
The Rock River at Fort Atkinson rose to Moderate flood stage. Floodwaters partially covered low spots on Highway 106 near Rock River Park. A riverside walkway near South Water Street in downtown Fort Atkinson was closed. A few homes and businesses were surrounded by water at the end of Vets lane near the intersection of Highway 106 and Blackhawk Island Road about 1 mile southwest of Fort Atkinson. Flooded roads included Sinissippi Drive, Vets Ln, Fox Hill Rd, Bark River Road from Kutz Road to Rock River Road, Rock River Rd from Milwaukee Ave E to Hwy 106, and Ralph Rd. North Shore Road about 1 mile southwest of Fort Atkinson was closed. The river walkway in Fort Atkinson, Mechanic St boat launch, parking lot of Purdy St, yards along E Milwaukee Ave, yards on northern end of Rock River Rd, yards on Rodgers St flooded. Water backed up the Bark River into Nature Park and the parking lot. Floodwaters covered fields on the east side of Fort Atkinson.
The wider storm
There was extensive river flooding along the Wisconsin River, Fox River, and Rock River in southern Wisconsin in April. The river levels were above normal after 5 inches of rain fell over the 5 days, and then another episode of heavy rain of 3 to 5 inches occurred on April 17th. In addition, vegetation was still fairly dormant so the grass was not able to soak up much of the rainfall.
Began near Ft Atkinson (42.9500, -88.8700).
Source: NOAA Storm Events Database, event 1332916. Narratives are written by the National Weather Service forecast office that issued the report.
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