South Dakota — A wall of dense, glowing fog swallows the early-morning lights across Sioux Falls today, turning roads into gray tunnels with visibility dropping to a quarter mile or less. Drivers heading out for early Thanksgiving travel will feel the damp chill immediately, with headlights cutting only narrow beams through the moisture-laden air. Conditions change quickly in pockets, especially near open fields and low-lying stretches of I-29 and I-90.
According to the National Weather Service, a Dense Fog Advisory remains active through 9 a.m., with slow improvement expected from northwest to southeast. The fog’s rapid shifts could create hazardous travel moments, especially at intersections and rail crossings where approaching traffic may appear suddenly. Residents should allow extra commute time, use low-beam headlights, and increase following distance on all major routes.
The fog lifts gradually through the late morning as northwest winds strengthen. Afternoon cloud cover remains but offers more stability for local errands and regional travel. With Thanksgiving now just one week away, today’s fog serves as a reminder that late-fall weather can still disrupt travel plans even without snow.
Friday turns brighter, with mostly sunny skies and highs in the upper 40s. Saturday stays mild and comfortable for early holiday decorating, leaf pickup, or last-minute outdoor chores before colder air returns next week. Sunday brings sunshine again, though lingering moisture could briefly cling to sheltered valleys around daybreak.
Looking ahead, long-range models continue hinting at a Winter Tease across parts of the northern U.S. between November 25 and early December, including potential heavy snow bands setting up from the Plains to the Great Lakes. Sioux Falls sits near the southern edge of that potential—worth watching for any late-breaking Thanksgiving travel impacts.
Five-Day Outlook (Sioux Falls, SD)
Saturday: Mostly sunny, high 38°.
Sunday: Sunny, high 55°.
Monday: Partly sunny, chance of rain 20%, high 51°.
Tuesday: Mostly sunny, high 46°.
Wednesday: Sunny, high 44°.
