Milwaukee, Wisconsin – A fast-developing line of storms could hit within hours Monday evening, bringing damaging winds, heavy rain, and possible flooding that may shut down roads and delay travel across southern Wisconsin.
According to the National Weather Service in Milwaukee/Sullivan, storms will begin as scattered showers Monday morning before intensifying between 5 p.m. and midnight. The most dangerous window is expected from 7 p.m. to 10 p.m., when a stronger line of storms may produce wind gusts over 60 mph, isolated tornadoes, and hail near 1 inch in diameter.
The highest impacts are expected along the Wisconsin-Illinois border, including Kenosha, Racine, Janesville, and Milwaukee. Major routes such as I-94, I-43, and US-41 could see sudden visibility drops and water-covered pavement. Rainfall totals of 1 to 2 inches are likely, with localized totals exceeding 2 inches, especially in southeast Wisconsin, raising the risk for urban and lowland flooding.
Emergency managers warn that repeated rounds of storms may worsen existing river flooding along the Rock, Fox, and Des Plaines river basins. Residents in flood-prone areas should monitor water levels closely and avoid driving through flooded roadways.
Charge devices, secure outdoor items, and have multiple ways to receive warnings before storms arrive. Additional updates are expected Monday afternoon as storm timing and severity become clearer, and alerts may expand if conditions intensify.
