On Wednesday at 10:28 p.m. the National Weather Service released a dense fog advisory valid for Thursday between 4 a.m. and 10 a.m. for Pickens, Tuscaloosa, Sumter, Greene, Hale, Perry, Bibb, Chilton, Marengo, Dallas, Autauga, Lowndes, Elmore, Montgomery, Macon, Bullock, Russell, Pike and Barbour counties.