Weather Alerts For Oshkosh, WI

# HEADLINE -------------------- EXTREME HEAT WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values up to 107 possible. WHERE Marathon, Portage, Waushara, Wood, Calumet, Winnebago, Brown, Outagamie, Shawano, and Waupaca Counties. WHEN From Monday afternoon through Monday evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Sunday, June 28, 2026 at 1:33 AM CDT ISSUED BY National Weather Service Green Bay WI HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. # AREAS AFFECTED -------------------- Winnebago, Brown, Calumet, Marathon, Outagamie, Portage, Shawano, Waupaca, Waushara, Wood Including the cities of Angelica, Green Bay, Winnebago, King, Plover, Wausau, Arnott, Wittman Field, Wisconsin Rapids, Thornton, Menasha, Clintonville, Auroraville, Marshfield, Appleton, Lind Center, Northern Lake Winnebago, Darboy, Borth, Silver Lake, Wautoma, New London, Shawano, Stevens Point, Bakerville, Waupaca, Hofa Park, Rural, Northport, Neenah, Oshkosh, Dundas, and Mackville