Weather Alerts For Spencer, WI

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT TUESDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values up to 109 expected both today and Tuesday afternoon. Overnight heat indices will remain around 75 degrees, which will still be hazardous for anyone without shelter after the extreme heat in the afternoon. WHERE Marathon, Portage, Waushara, Wood, Calumet, Winnebago, Brown, Outagamie, Shawano, and Waupaca Counties. WHEN Until 7 PM CDT Tuesday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Monday, June 29, 2026 at 9:51 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 Wisconsin Rapids, Chilton, Menasha, New London, Waupaca, Shawano, New Holstein, Wausau, Appleton, Plover, Redgranite, Marshfield, Stevens Point, Green Bay, Oshkosh, Neenah, Clintonville, Wautoma, and Brillion

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS PARTS OF EASTERN NORTH DAKOTA AND NORTHWESTERN MINNESOTA SUMMARY Severe thunderstorms are expected today across the Dakotas, Upper Midwest and Middle Missouri Valley, including damaging winds, large hail and a few tornadoes this afternoon through tonight. 20Z Update The most noteworthy change with this update was the addition of 10-percent tornado probabilities (with CIG1) over parts of eastern ND into northwestern MN. Here, the latest surface observations and visible satellite imagery indicate a warm front moving slowly northward. In the wake of an earlier MCS, diurnal heating of a moist air mass (lower 70s dewpoints) and steep midlevel lapse rates should yield sufficient boundary-layer recovery for the development of surface-based storms ahead of a surface low tracking northward across the Dakotas this afternoon and evening. Related strong buoyancy (3000-4000 J/kg MLCAPE) and increasingly large clockwise-curved hodographs (200-300 m2/s2 effective SRH) near the boundary will support a locally favorable corridor for a few supercell tornadoes (some of which could be strong).