Sioux Falls, South Dakota – Roads across southeast South Dakota could become dangerously slick overnight as freezing rain develops, creating a glaze of ice just in time for the Thursday morning commute.
According to the National Weather Service in Sioux Falls, the highest impact window runs from midnight through noon Thursday, when a wintry mix transitions to freezing rain across the region. Ice accumulations between 0.10 and 0.20 inches are possible, especially along and east of the I-29 corridor, including Sioux Falls, Brookings, and Yankton.
While snowfall totals remain limited—generally under 2 inches and mainly along and south of Highway 14—the primary hazard will be ice forming on roads, bridges, and overpasses. Even light glazing can significantly reduce traction and increase crash risk during peak travel hours.
Drivers are urged to slow down, allow extra stopping distance, and check road conditions before heading out Thursday morning. Untreated surfaces and rural roads will be especially hazardous.
Conditions are expected to gradually improve by midday Thursday, but lingering slick spots may persist as temperatures slowly rise above freezing.
