Dense Fog Advisory issued January 20 at 9:08PM MST until January 21 at 2:00AM MST by NWS

…DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CST SATURDAY… * WHAT…Visibility less than one mile in dense fog. * WHERE…Portions of central, east central, south central and southeast South Dakota. * WHEN…Until 3 AM CST Saturday. * IMPACTS…Hazardous driving conditions due to low visibility.