Not much has changed in the thinking or timing of the snow today. There is still a Winter Storm Warning for southern Wisconsin that will go into effect at 2pm today until Saturday evening, and there is a Winter Weather Advisory in effect for all of Northern Illinois.
Snow totals will be the highest near and just north of the Wisconsin Stateline, and sweeping southeast into McHenry County with 6-8", and then totals will taper off to the south and west. 4-6" is likely south of Rockford to just north of Sterling. 1-3" is a good bet in Whiteside and Lee counties, with more of a winter mix possible as warmer air surges near the I-80 corridor.
Those totals will be for the time period of Friday afternoon through Saturday evening. But, I wanted to try and break down the rough timing of the snow accumulations. Friday afternoon and evening will get the brunt of the snow with moderate to potentially heavy snow at times. Watch for accumulations north at about 2-4". Overnight is when the snow really lightens up, and even a period of sleet or a winter mix will develop (especially south) there could be an additional inch on the ground. We can expect a break from the snow ( a lot like last weekend) through Saturday morning to about noon. A strong arctic cold front will arrive Saturday afternoon, this wave of snow will bring an additional 1-3" for the area.
You'll want to watch for potential blowing snow Saturday afternoon and evening with strong northwest winds behind the front. In the bands of moderate to heavy snow visibility will be reduced, along with having to deal with slick roads. If there are any changes to the track or expected impacts we will make sure to keep you posted!
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