Dense Fog Advisory issued December 25 at 1:46PM MST until December 25 at 11:00PM MST by NWS

…DENSE FOG ADVISORY NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT… * WHAT…Visibility one quarter mile or less in dense fog. * WHERE…Portions of central, east central and southeast South Dakota and northwest Iowa. * WHEN…Until midnight CST tonight. * IMPACTS…Hazardous driving conditions due to low visibility.