National Weather Service United States Department of Commerce

The highest risk of severe storms will remain to our west through late tonight. However, isolated thunderstorms are possible through 9 PM across north-central and far northeast WI. Another round of storms are expected again after midnight across the north.
Strong to severe storms are possible on Wednesday, especially during the afternoon and evening. Greatest risk from 1 PM to 9 PM. The primary risk will be strong/damaging winds and heavy rainfall that could lead to localized flash flooding. Large hail and an isolated tornado can't be ruled out.
Update to the potential for heavy rain. Rounds of storms will produce heavy rainfall Wednesday and Wednesday night. Instances of flash flooding could occur, especially if storms move over the same locations multiple times.