Light precipitation moves in later tonight and departs around mid-morning Tuesday. Whether it falls as drizzle, freezing drizzle, or snow hinges on the EXACT combination of multiple factors that are difficult to pin down. Any icing amounts will be light and are most favored over northeast Iowa into southwest Wisconsin. Bottom line, if you have travel plans tonight into Tuesday morning, keep an eye on the forecast and road conditions as any amount of ice could turn roads slick.