The National Weather Service says Northeast Wisconsin could be hit by a mixture of snow and freezing rain early Friday before the precipitation turns to all rain Friday afternoon.
The Green Bay NWS office says:
Snow will move into the area tonight and may mix with, or change to, freezing rain toward daybreak. A change to rain is expected as temperatures warm up Friday morning. The heaviest precipitation is forecast to occur from around midnight through early Friday morning. Storm total snowfall should be mostly in the 0.5 to 1.5 inch range. A minor ice accumulation is possible due to the freezing rain. Roads may become slippery once the precipitation begins. Use extra caution when driving. Slow down and allow plenty of distance between you and the vehicle ahead of you.