291 WWUS83 KFSD 241148 SPSFSD Special Weather Statement National Weather Service Sioux Falls SD 548 AM CST Sun Nov 24 2024 SDZ050-052-057-058-063-064-241430- Gregory-Jerauld-Brule-Aurora-Charles Mix-Douglas- Including the cities of Gregory, Burke, Wessington Springs, Alpena, Chamberlain, Kimball, Plankinton, White Lake, Stickney, Wagner, Platte, Lake Andes, Marty, Armour, Corsica, and Delmont 548 AM CST Sun Nov 24 2024 ...AREAS OF DENSE FOG EARLY THIS MORNING... Areas of dense fog reducing visibility to less than one half mile have developed between the James and Missouri River Valleys in south central South Dakota. Conditions are expected to slowly improve through 8 to 9 AM, though additional fog may develop into Gregory County west of the Missouri River. If traveling in areas west of the James River this morning, be prepared for changing visibility. With temperatures near to below freezing, untreated surfaces may become slippery due to freezing fog. $$