Thursday, September 3: Heat, Thunderstorms and Localized Flooding Potential in Sheboygan County
Sheboygan County, WI — September 3, 2026. The National Weather Service Milwaukee/Sullivan office included Sheboygan County in its 5:18 a.m. CDT Thursday Hazardous Weather Outlook, highlighting afternoon heat, increasing thunderstorm chances and the potential for locally heavy rain later Thursday, September 3, into Friday, September 4.
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7-Day Weather Forecast
Thursday afternoon brings heat and storm chances
The Sheboygan County forecast zone, WIZ052, calls for patchy fog during the morning, mostly cloudy skies, temperatures in the lower 80s and a 50 percent chance of showers and thunderstorms during the day.
Afternoon heat indices may reach the 90s. The outlook does not establish an extreme-heat warning for Sheboygan County, but residents should plan for warm, humid conditions by drinking water and making use of shade, especially during outdoor work, recreation or visits to local events.
Higher rain chances arrive later Thursday
Thunderstorm chances are expected to increase during the evening and overnight hours. The county forecast lists a 90 percent precipitation chance for Thursday night, with showers and thunderstorms continuing into the early hours of Friday.
Some storms could produce locally heavy rainfall. The National Weather Service said ponding or minor flooding may develop where storms repeatedly track over the same area. Conditions may vary significantly between communities, so residents should be prepared for a wet commute or changing plans even if nearby areas receive less rain.
What Sheboygan County residents should watch
Keep weather alerts available before evening outdoor plans, late-night travel or Friday morning commutes. If heavy rain develops, allow extra time and use caution around water collecting on roads or in low-lying areas.
The broader outlook mentions possible strong to severe storms, damaging winds and hail, with the greatest emphasis across south-central Wisconsin. Those risks should not be assumed to be equally likely throughout Sheboygan County. The outlook also says spotter activation may be needed Thursday night, so residents should continue checking updated National Weather Service information as conditions develop.
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