Some areas of the state have seen a 40-degree temperature swing as a cold snap settles in.

City, county and state crews have started pre-treating roads, to keep them from freezing over. Usually road crews like to pre-treat if they're sure rain and sleet will not wash away the brine.

Click here for road conditions

Some crews in Western Kansas haven't pre-treated the roads because the freezing temperatures would cause the brine to make the roads slicker.

Ford County said it usually uses between 100 to 150 tons of salt per winter.

The main concern with this winter blast is the cold. Wind chills will mostly be zero or below and could get into the 15-25 below range in the northwest. A Wind Chill Advisory is in effect there.

Light snow will spread across southern Kansas Thursday, starting in western Kansas in the morning.