There is a possibility of patchy dense fog in parts of the Tennessee Valley, specifically in north Alabama and southern middle Tennessee. In isolated areas, visibility has dropped to 1/4 mile or less. Motorists are advised to exercise extreme caution while driving, as visibility will vary due to the patchy nature of the fog. To ensure safety, it is recommended to use low beams, reduce driving speed, and maintain a safe distance from other vehicles. The fog is expected to dissipate by 9 AM. For additional updates, individuals are encouraged to stay informed through NOAA Weather Radio or their preferred local media outlet, as provided by the National Weather Service in Huntsville.