National Weather Service United States Department of Commerce

6/28/26 6 AM Update - After pleasant conditions with comfortable humidity on Sunday, look for hot and very humid conditions arriving Monday. The heat and humidity will continue through the week with heat indices around 100 degrees. Additionally, there is chance for afternoon showers and storms Sunday afternoon and Sunday night. Some of the storms Sunday night may be strong to severe. There are periodic chances of thunderstorms next week, some which could be strong or severe at times.
[6/28/26] Update on the heat for Monday. An Extreme Heat Watch is in effect for much of central to east-central Wisconsin, including the Fox Valley for Heat Indices on Monday getting into the 100-107 range in the afternoon. The lakeshore areas are currently not in the watch as temperatures may remain slightly cooler off Lake Michigan.
[6/28/26] 6:25 AM Update. Severe weather potential has expanded for include the entirety of the area tonight. Potential for strong to severe storms is still expected to arrive late overnight, generally around or after midnight. Storms will largely spread from the northwest eastwards. The main severe weather threats will be very heavy rainfall and damaging winds, but some hail may also mix in at times.