Anyone west of that line could see up to 6 inches of snow, and anyone east won't see more than 2 inches.
A blizzard warning has come to an end for southeastern Wisconsin where a glancing blow from a central Midwestern storm dumped about nine inches of snow in some areas.
The weather service cautioned that snow, sleet and strong winds will create slick roads, poor visibility and risky travel leading into the morning.
Portions of Nebraska, Iowa and Missouri saw whiteout conditions overnight and into Sunday morning due to a strong winter storm that's bringing widespread snow. The storm also forced airlines to cancel hundreds of flights on the busiest travel day of the Thanksgiving holiday weekend. More than 150 flights due to depart from Chicago's O'Hare Airport were cancelled early Monday, according to the site. Overall, nationwide, USA Today reported 500 canceled flights total, and another 700 delayed as of 11:50 am ET Sunday. There, actual blizzard conditions are not unlikely on Sunday. Up to 5 inches of snow fell in parts of MI.
Major cities including Kansas City, Mo., and Chicago are expecting heavy snow on Sunday.
In the Loop, snow wasn't sticking to the ground until around 6:15 a.m., leaving only an inch or two on untreated sidewalks by the time the snow ended a couple hours later. However, the airport reopened Sunday night.
"Winter storm warnings and winter weather advisories are also in effect from central Missouri northward into eastern MI; these warnings and advisories will also come to an end by this afternoon".
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The affected areas include Cook, DuPage, Kendall, Grundy and Will counties, the National Weather Service said in a winter storm warning.
Omaha and most of the area north of Interstate 80 was still under a winter weather advisory Sunday morning.
Meteorologists at the National Weather Service office in Pleasant Hill have declared a Blizzard Warning for all of Western Missouri until 9 p.m. Sunday.
"It's a heavy, wet snow, and what's gonna make it worse is high winds are expected, so there could be a lot of blowing and drifting". That included semitrailers jackknifed across the highway.
Almost every roadway in the state of Nebraska, southwest Iowa and northwest Missouri was either partially covered or fully covered by snow and blowing snow at 8 a.m. Sunday, making travel almost impossible across the region.
By Monday morning, the storm was expected to hit parts of northern IN and southern MI. This will lead to whiteout conditions, making travel extremely risky.