Dense Fog Advisory issued February 19 at 10:55PM MST until February 20 at 5:00AM MST by NWS

…DENSE FOG ADVISORY IN EFFECT UNTIL 6 AM CST MONDAY… * WHAT…Visibility one half mile or less in dense fog. * WHERE…Portions of east central and southeast South Dakota. * WHEN…Until 6 AM CST Monday. * IMPACTS…Hazardous driving conditions due to low visibility.