Wisconsin Severe Extreme Heat Watch | Effective 06/27/2026 23:33

Headline: 
Extreme Heat Watch issued June 28 at 1:33AM CDT until June 29 at 8:00PM CDT by NWS Green Bay WI
Event: 
Extreme Heat Watch
Urgency: 
Future
Effective: 
June 27, 2026 - 11:33pm
Expires: 
June 28, 2026 - 10:00am
Description: 
* 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.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Area Description: 
Marathon; Shawano; Wood; Portage; Waupaca; Outagamie; Brown; Waushara; Winnebago; Calumet
Forcast Office: 
NWS Green Bay WI