The National Weather Service office in Paducah has issued a dense fog advisory, in effect until 11 a.m. for all of western Kentucky and southern Illinois.
Visibility is one quarter mile or less in places.
Widespread dense fog will add to travel woes, along with slushy or icy patches on road surfaces, especially secondary roads.
Turn on your car headlights, slow down and allow plenty of distance ahead of you. Foggy conditions will be slow to improve.