* WHAT…Visibility one half mile or less in dense fog.
* WHERE…Portions of northwest and west central Iowa, southwest
Minnesota, northeast Nebraska, and central, east central, south
central, and southeast South Dakota.
* WHEN…Until 11 AM CST this morning.
* IMPACTS…Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS…Temperatures near to below freezing could
lead to isolated slick spots or minor icing, especially on
untreated surfaces.