Sioux Falls, South Dakota – Drivers across South Dakota should brace for a messy Wednesday morning as dense fog and fast-moving thunderstorms target the region. Visibility may drop below one mile before sunrise, especially along I-90 from Sioux Falls to Mitchell, raising serious concerns for early commuters.
According to the National Weather Service in Sioux Falls, scattered showers and storms will fire up late Tuesday and intensify overnight into Wednesday morning. Between 5 a.m. and 10 a.m., isolated severe weather is possible, with quarter-sized hail and wind gusts reaching 60 mph. The highest risk zones lie north of I-90, including Brookings and Madison.
Smoke from Canadian wildfires will also push into the region by Wednesday afternoon. Sensitive groups should limit time outdoors, especially with light winds keeping smoke near the surface. North winds may gust up to 25 mph through the afternoon.
Most of Thursday and Friday will bring calmer, sunny conditions—ideal for those planning outdoor events or early fall activities. Temperatures will dip into the 40s overnight later this week, a clear signal that fall is settling in.
Expect another warm-up by the weekend, but with mostly clear skies and no major rain threats for high school football or weekend plans.
More advisories may be issued as conditions evolve. Stay updated and use caution during Wednesday’s morning commute.
Five Day Forecast for Sioux Falls, South Dakota:
- Wednesday: Morning showers and thunderstorms, high 65°F. Smoke possible. Wind gusts to 25 mph.
- Thursday: Mostly sunny, high 74°F. Light northwest wind up to 15 mph.
- Friday: Sunny and cooler, high 64°F. Winds light.
- Saturday: Clear and sunny, high 69°F. Chilly start near 42°F.
- Sunday: Warmer with sun and clouds, high near 72°F.
