Green Bay, Wisconsin – Residents across northeast Wisconsin should stay weather-aware through Monday as multiple rounds of thunderstorms could bring damaging winds, large hail, and an isolated tornado. While confidence in exactly where storms will develop remains limited, any thunderstorm that forms could strengthen quickly during the afternoon and evening hours.
According to the National Weather Service in Green Bay, a weak front moving through the region will create opportunities for thunderstorms from Saturday through Monday. The severe weather threat is lower Saturday because of uncertainty in storm coverage, but forecasters caution that any storm that develops may rapidly become strong to severe.
Heat index values are expected to climb into the mid to upper 90s before storms develop, adding another layer of concern for anyone spending extended time outdoors. On Sunday and Sunday night, the severe weather threat increases across much of northeast Wisconsin, with much of the area under a Slight Risk (Level 2 of 5) for severe thunderstorms and northern sections under a Marginal Risk (Level 1 of 5).
The primary hazards include damaging wind gusts of 50 to 70 mph, hail up to 1 inch in diameter, and the potential for isolated tornadoes. Communities including Green Bay, Appleton, Oshkosh, Shawano, Marinette, Sturgeon Bay, Wausau, Crivitz, Rhinelander, and Manitowoc should monitor changing weather conditions closely. Travelers on Interstates 41 and 43, along with U.S. Highways 141, 45, and 51, could encounter rapidly changing conditions during stronger storms.
Residents are encouraged to have multiple ways to receive weather warnings, especially during the afternoon and overnight hours. Secure outdoor furniture and loose items before storms develop, and move indoors immediately if thunder is heard or warnings are issued.
Additional severe thunderstorm watches or warnings may be issued through Monday as confidence improves in the timing and placement of the strongest storms.
