Milwaukee, Wisconsin — A sharp late-season cold snap will move into Wisconsin early Friday, May 8, bringing freezing overnight temperatures that could disrupt travel and damage early-season crops across Milwaukee, Madison, Green Bay, Appleton, and Eau Claire.
According to NOAA’s Climate Prediction Center, temperatures will run 50–60% below normal through May 14, with the coldest air arriving Friday night into early Saturday. The most critical window is from 12 a.m. to 8 a.m. Saturday, when temperatures are expected to fall to or below 32 degrees statewide.
That drop will create immediate impacts. Frost is likely to form quickly on exposed surfaces, including bridges and overpasses along I-94, I-39, and I-43, increasing the risk of slick spots for early morning drivers. Rural and low-lying areas near Madison and Eau Claire may see colder pockets where freezing conditions linger longer, raising the risk of crop damage and stressing newly planted fields.
Light precipitation moving through Friday night could leave roads damp, allowing cold air to create patchy slick conditions before sunrise. Low-lying roads and drainage-prone intersections in Milwaukee and Green Bay, including underpasses and areas near rivers, may see minor water pooling that adds to travel hazards within minutes.
This is part of a broader stretch of unseasonably cold air covering much of the Midwest and eastern United States during this period.
Drivers should use caution on bridges and shaded roads early Saturday and avoid untreated surfaces where slick spots develop. Farmers and residents should cover sensitive plants and protect outdoor vegetation.
The highest risk for freezing temperatures and travel impacts peaks early Saturday between 12 a.m. and 8 a.m.
