National Weather Service United States Department of Commerce

Steady northwest winds and low temperatures ranging from -10 to -25 degrees will create dangerous wind chills tonight ranging from -30 to -45. An Extreme Cold Warning is in effect across the entire forecast area tonight. Tonight will be the coldest night before temperatures start to moderate back toward normal by the end of the week.
An area of light snow will spread across Wisconsin early Wednesday morning, gradually tapering off or ending overnight into Thursday morning. Most locations should see around an inch or less. While amounts will be on the light side, even a small amount of snow could create slippery spots. The onset of snow coincides with the morning commute for central/north-central WI.
If you suspect that frostbite or hypothermia is starting to set in, seek medical attention immediately!
Due to the lack of snow cover across parts of the area, the potential is higher for pipes to freeze. Here are some useful tips to keep pipes from freezing during the cold.