Dense Fog Advisory issued February 01 at 1:38AM MST until February 01 at 9:00AM MST by NWS

…DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING… * WHAT…Visibility one quarter to one half mile in dense fog. * WHERE…Portions of northwest and west central Iowa, northeast Nebraska, and central, east central, south central, and southeast South Dakota. * WHEN…Until 10 AM CST this morning.