National Weather Service United States Department of Commerce

An active period of weather is expected this evening through Wednesday morning. Strong to severe storms will be possible this evening. Cold air will then intrude into the region, changing any remaining rain over to a wintry mix and wet snow Wednesday morning.
Storms are expected to develop between 4 PM and 7 PM today. Any storms that form initially will have the best chances for large hail. Storms will then continue through the evening, mostly ending by midnight.
Areas of drizzle and freezing drizzle may develop early Wednesday morning with a glaze of ice possible on untreated roads north and west of the Milwaukee metro area. The drizzle will then turn to snow by mid to late morning with light snow continuing into the early afternoon.