Dense Fog Advisory issued January 21 at 11:36PM MST until January 22 at 8:00AM MST by NWS

…DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING… * WHAT…Visibility one half mile or less in dense fog. * WHERE…Portions of east central and southeast South Dakota. * WHEN…Until 9 AM CST Sunday. * IMPACTS…Hazardous driving conditions due to low visibility.