National Weather Service United States Department of Commerce

A Winter Weather Advisory is in effect 1 AM to 9 AM Thursday morning for portions of central and east-central Wisconsin. There is potential for freezing rain in the Advisory area, with ice accretions mainly on elevated and untreated surfaces. Some slick spots will be possible into the Thursday morning commute. Rapidly rising temperatures post-dawn Thursday morning will quickly end the freezing rain threat and melt any associated ice.
Here are the expected freezing rain ice accumulations for late tonight into early Thursday morning. Some sleet could potentially mix in right as the precipitation starts late tonight, but should not measurably accumulate. This leaves freezing rain as the only noteworthy threat. Ice totals will be mainly on elevated / untreated surfaces, and will be heavily dependent on the exact temperatures.
Here are the Thursday afternoon / evening thunderstorm hazards and threat levels across our region.
Here is the expected timeline of events for Thursday's severe weather threat.