699
WWUS83 KFSD 291121
SPSFSD

Special Weather Statement
National Weather Service Sioux Falls SD
621 AM CDT Fri Aug 29 2025

IAZ020-031-NEZ013-014-SDZ069>071-291400-
Plymouth-Woodbury-Dixon-Dakota-Yankton-Clay-Union-
Including the cities of Le Mars, Sioux City, Wakefield, Ponca,
Allen, South Sioux City, Yankton, Vermillion, North Sioux City,
Beresford, Elk Point, Alcester, and Jefferson
621 AM CDT Fri Aug 29 2025

...PATCHY DENSE FOG FOR MORNING COMMUTE...

Areas of fog, some locally dense reducing visibility to a quarter
mile or less, have developed across portions of the Missouri River
Valley and Highway 20 corridor.

Travelers should be prepared for rapidly changing visibility,
and use extra caution at intersections, railroad crossings, and
school bus stops. The fog is expected to improve by 9 AM CDT.

$$