Moderate rain continues to fall over much of northern Illinois, but the transition over to snow has already started over southern Wisconsin and northwest Illinois. As temperatures continue to cool closer to freezing Monday evening, the transition over to light snow will take place from west to east through roughly 9pm/10pm.
Light snow will then continue into early Tuesday morning. Slushy accumulations are possible, but
will mostly remain on grassy surfaces and stay under an inch. Snow has been accumulating further north across Wisconsin where several inches of snow have already fallen. As some of the moisture in the atmosphere decreases overnight, there is the potential for very light freezing drizzle to mix with some of the flurries. No ice accumulation is expected, but the freezing drizzle combined with temperatures near and below freezing could make untreated roads a little slick for those coming home following New Year's Eve celebrations. Skies will remain cloudy to kick off the new year. There may even be a few flurries around through the afternoon.
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