A dense fog advisory was released by the National Weather Service on Thursday at 12:50 p.m. valid for Friday between 3 a.m. and 10 a.m. for Pickens, Tuscaloosa, Sumter, Greene, Hale, Perry, Bibb, Chilton, Coosa, Tallapoosa, Marengo, Dallas, Autauga, Lowndes, Elmore, Montgomery, Macon, Bullock, Pike and Barbour counties.