Good morning! Here are three graphics/tweets to summarize heavy snow later today & freezing rain overnight.
Impacts will be seen to this eve's commute, and they may be significant in places due to heavy snow rates. Plan accordingly & use travel flexibility if able. #ILwx#INwx
Here is a look at forecast onset time of snow later today. It won't take long (<1 hr) for snow to become heavy after onset. This is especially true along/north of I-80. This is why travel will become hazardous. Expect it to look like the photo in this graphic by early eve!
After the burst of snow into early eve, the snow will likely lighten some south of I-88 while continuing heavy along/north. A mix will spread north overnight including some freezing rain & icing. While it will warm to above freezing Wed A.M., lingering travel impacts are likely.
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A long-lived, large storm complex tracked from the NE/IA border, across IA, northern IL, & northern IN. This produced widespread damage to trees, toppled several semis, & caused some structure damage.
The peak gusts (measured & estimated) were frequently 70-90 mph & persisted for 15+ minutes with some locations experiencing even higher. These wind speeds are equivalent to EF-0 to EF-1 tornadoes but over a vastly larger area than a tornado would impact. #ILwx
While much of the wind damage was straight-line wind, a few tornadoes were likely embedded within the storm complex across the region, and one has been confirmed in Rogers Park, IL. This did move out over Lake MI becoming a waterspout. #ILwx