...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT SUNDAY... * WHAT...Visibility one quarter to one half mile in dense fog. * WHERE...Portions of North Mississippi, West Tennessee, East Arkansas and the Missouri Bootheel. * WHEN...Until 9 AM CDT Sunday. * IMPACTS...Hazardous driving conditions due to low visibility. * ADDITIONAL DETAILS...If driving, slow down, use your low beam headlights, and leave plenty of distance ahead of you.