Milwaukee, WI – Heavy rainfall and repeated thunderstorms are expected to impact much of Wisconsin from tonight through Monday night, with the greatest threat centered over parts of central and southern regions.
According to the National Weather Service Milwaukee/Sullivan, multiple rounds of storms will move through the state, bringing the potential for 1 inch or more of rain in many locations, and in some cases over 2 inches. The heaviest rainfall rates, possibly reaching 2 inches per hour, are expected during slow-moving storms between Saturday and Monday. Areas already saturated from recent rains could see an increased risk of flooding.
Forecast models show the highest probability for 1 inch or more of rainfall — up to 100% in some locations such as Lone Rock — across central Wisconsin. Portions of Dodgeville, Portage, and Sauk City also face rainfall potential in the mid- to high-90% range. The likelihood for 2 inches or more of rain is lower but still significant in some areas, including Wisconsin Dells and Lone Rock, where chances approach 70%.
The weather service cautions that the exact location of the heaviest rain remains uncertain due to shifting storm tracks. Small changes could result in major shifts in where flooding occurs. Rainfall totals will depend heavily on the paths of storm complexes and the number of times they pass over the same locations.
Residents are urged to remain alert for updated flood advisories, avoid driving through flooded roads, and take precautions such as moving important belongings from basements. The peak rainfall threat is forecast overnight Saturday and Sunday, tapering off by Tuesday morning.
This system is expected to move southeastward as a frontal boundary dips into southern Wisconsin late Sunday, maintaining storm intensity until it exits early next week.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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