A winter storm warning has been issued for Ford and Iroquois counties.
An additional one to two inches of snow is expected in those counties, with winds increasing to 25 mph, gusting up to 50 mph.
Conditions are expected to rapidly deteriorate at about 6 p.m., with blizzard-like conditions possible as a result of blowing snow.
State police have issued a travel advisory for highways in East Central Illinois.
Affected areas include Champaign, Coles, Douglas, Coles, Edgar, Moultrie, Piatt and Vermilion counties.
Police report scattered areas where whiteout conditions may exist tonight and into tomorrow morning due to high winds blowing snow blowing across roadways.
Motorists are cautioned to reduce speed as they approach areas where snow is blowing across the roadway, as visibility is essentially nonexistent once inside the blowing snow.
The National Weather Service has also issued a wind advisory from 8 p.m. Sunday through 6 a.m. Monday.
Gusty winds are expected to begin to move through central Illinois on Sunday evening and will continue through the night.
Northwest winds of between 30 and 45 mph are expected.
There will be a two- to three-hour burst of light snow accompanying the strong winds, which may make driving difficult due to lower visibility.