The tornado caused extensive damage in Appleton and Menasha, including homes with roofs torn off, downed power lines, and uprooted trees. Local authorities have urged residents to stay indoors as first responders assess the damage and search for victims. Power outages have affected tens of thousands of residents, with entire areas like Menasha reportedly without electricity. Additionally, a 29-year-old man in Whitewater, Wisconsin, was killed earlier in the day by a suspected lightning strike. Severe thunderstorms with wind gusts up to 100 mph and large hail continue to threaten the region, with the potential for additional isolated tornadoes.