More Rain Sunday Night, Snow Moves in Monday

 10:10pm Update: Rain has become more widespread Sunday evening with pockets of moderate rain falling along the I-39 corridor.  Colder air moving in from the west has caused temperatures to fall into the 30s and 40s across NW IL.  The colder air will cause some of the rain showers to mix with, or transition over, to light snow after Midnight, but no accumulations are expected Monday morning. 

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The last couple of days of 2019 will not only be rainy, but also cold and snowy as a large storm system moves across the Midwest and Great Lakes. After a brief break from some of the rain Sunday afternoon, showers have redeveloped to the south and continue to lift north into northern Illinois and southern Wisconsin. Rain will become more heavy and widespread through Midnight before shifting east Monday morning. Additional rainfall amounts could add up to another half an inch across parts of northern Illinois.

The first of two cold front will move through the Stateline, with the first arriving during the overnight. This will help pull temperatures down into the 30s Monday morning. Light rain will mix with, and possibly even transition over to, light snow during the morning but very minimal accumulations are expected. A second cold front arrives Monday evening and this will bring a better chance for snow area wide through Tuesday morning. Minor accumulations are likely, along with the possibility for blowing and drifting snow as winds will gust to 30-35 mph through the evening. Snow accumulations will range from around half an inch to two inches (southern Wisconsin) by Tuesday morning.

Impacts to roads are expected to be minor Monday morning, but roads will likely become slick Monday night and Tuesday morning with temperatures below freezing. A few flurries, light snow showers, are possible through Tuesday afternoon but Tuesday night is expected to remain dry. There may be some residual slick spots as temperatures remain below freezing through Wednesday morning.