Sioux Falls, South Dakota – A dangerous combination of triple-digit heat and severe storms will slam parts of South Dakota Tuesday afternoon, July 29, threatening road safety and outdoor plans across the state.
According to the National Weather Service in Sioux Falls, strong to severe thunderstorms are expected to redevelop after 2 p.m. Tuesday. The greatest threats include damaging winds exceeding 70 mph and large hail, especially along and east of I-29. Locally heavy rainfall may reduce visibility during the afternoon commute.
Storms will follow a stretch of sweltering heat, with temperatures near 92°F and heat index values climbing to 107°F by mid-afternoon. Residents are urged to limit outdoor exposure, stay hydrated, and avoid travel during storm activity. Spotter activation may be required by late afternoon.
The Sioux Falls area remains at risk for additional storms through Tuesday night, with another round possible late Wednesday. While the midweek period stays unsettled, a quieter and slightly cooler pattern begins to emerge by Thursday.
📅 Five-Day Forecast: Sioux Falls, SD (Tuesday, July 29 – Sunday, August 3)
- Tuesday: High 92°F. Heat index up to 107°F. Severe storms possible after 2 PM. Wind gusts up to 70 mph.
- Wednesday: High 77°F. Chance of showers (30%) in the afternoon. Breezy with northeast winds up to 15 mph.
- Thursday: Mostly sunny, high of 79°F. Pleasant and dry.
- Friday: Partly sunny and warmer. High near 77°F with a low of 59°F.
- Saturday: Mostly sunny, high near 75°F. Dry stretch continues into Sunday.
- Sunday: High near 79°F. Comfortable and quiet weather pattern holds.
⚠️ Stay weather aware Tuesday afternoon and evening—conditions may change rapidly. Updates will be issued as new alerts are posted.
