London, Kentucky – Early morning commuters across south-central Kentucky and much of eastern Tennessee are waking to thick fog that has reduced visibility to near zero in some areas, triggering multiple Dense Fog Advisories through 9 a.m. EDT Tuesday.
According to the National Weather Service offices in Louisville, Morristown, Jackson, and Nashville, visibility dropped to one-quarter mile or less in several counties, including Laurel, McCreary, Knox, Cumberland, Clay, and Fentress. The advisories stretch across the Cumberland Plateau into portions of Virginia and North Carolina, warning drivers from London to Knoxville to exercise extreme caution.
Cities like Columbia, Cookeville, Jamestown, and Middlesboro are among the hardest hit. Travel along U.S. 27, I-75, and Route 127 may be especially dangerous during the morning hours. Authorities urge drivers to use low-beam headlights, slow down, and leave extra stopping distance.
In Middle Tennessee, some of the same counties also remain under a Heat Advisory through Wednesday evening, with heat index values forecast to reach 108°F. Officials recommend limiting outdoor activity and checking on vulnerable neighbors.
Fog should lift by mid-morning, but patches may linger in valleys and hollows. Additional advisories could follow if visibility fails to improve.
