Fog, some dense, has developed early this morning, primarily in the river valleys. Localized visibility reductions to one quarter mile or less are possible. Motorists traveling through the river valleys should be prepared for quick changes in visibility this morning. Be sure to slow down and use low beam headlights when encountering dense fog. The fog will thin and dissipate after sunrise.

Fog has developed early this morning, particularly in river valleys in the Bluegrass and Lake Cumberland regions. Fog is more widespread across eastern Kentucky, but should continue to gradually expand through sunrise. Expect dense fog currently along the Kentucky and Cumberland rivers to slowly spread to other areas as well. Motorists should use extra caution this morning and be prepared for a sudden drop in visibility, possibly to near zero. Reduce speed and use low beam headlights in foggy areas. Visibility in fog is expected to improve by 9 AM EDT.

Fog, some dense, has developed early this morning, primarily in the river valleys. Localized visibility reductions to one quarter mile or less are possible. Motorists traveling through the river valleys should be prepared for quick changes in visibility this morning. Be sure to slow down and use low beam headlights when encountering dense fog. The fog will thin and dissipate after sunrise.

* WHAT. Visibility one quarter mile or less in dense fog, especially in the river valleys. * WHERE. Portions of east central, northeast, south central, and southeast Kentucky. * WHEN. Until 10 AM EDT this morning. * IMPACTS. Low visibility could make driving conditions hazardous.