Green Bay, Wisconsin – Scorching heat and powerful storms are converging on eastern Wisconsin this Saturday, with major impacts expected from Green Bay to the Lake Michigan shoreline. Dangerous swimming conditions and flooding risks are prompting urgent warnings for anyone heading outdoors or traveling through the region.
According to the National Weather Service in Green Bay, heat index values could spike as high as 96°F Saturday afternoon, followed by a round of strong to severe storms after 5 p.m. Residents in Brown, Door, Kewaunee, and Manitowoc counties should prepare for damaging wind gusts, localized flooding, and potential power outages. Anyone near Lake Michigan should avoid swimming, especially during peak wave activity Saturday afternoon and night.
Expect increasing clouds through the day, with a high near 91°F and southwest winds gusting up to 29 mph. Thunderstorms may develop late afternoon, intensifying through the evening. Some storms could dump up to a half-inch of rain or more, creating urban flooding risks in low-lying spots. Drivers along I-43 and other local roadways should be alert for reduced visibility and ponding on pavement.
Hazards also extend to beachgoers. High waves and rip currents will make Door and Kewaunee County shorelines particularly dangerous through late Saturday. NWS flags these areas as high-risk zones for swimming incidents.
Five-Day Forecast for Green Bay (July 5–July 10):
- Saturday (Jul 5): High near 91°F. Storms likely after 5 p.m. Gusts up to 29 mph.
- Sunday: Showers early, then clearing. High 79°F.
- Monday: Sunny and cooler. High 80°F.
- Tuesday: High 85°F. Thunderstorms possible after 1 p.m.
- Wednesday: Mostly sunny, high near 80°F. Chance of storms later.
