Sioux Falls, SD – Scattered thunderstorms are expected to intensify as they move into eastern South Dakota Thursday morning, bringing the potential for hail up to half-dollar size and wind gusts near 70 mph. The strongest activity could develop between 7 a.m. and noon, making for a hazardous start to the day.
According to the National Weather Service in Sioux Falls, storms will spread east tonight, with the greatest severe threat in the late evening and early morning hours. Residents in Minnehaha, Lincoln, and surrounding counties should prepare for sudden downpours, reduced visibility, and possible brief tornadoes.
Travelers along Interstate 90 and U.S. Highway 81 should allow extra time and monitor road conditions, especially during the morning commute. Outdoor items should be secured, and residents are advised to keep phones charged in case of power outages.
Hot, humid weather will follow Thursday’s storms, with heat index values near 100 degrees Friday and Saturday, particularly south of Sioux Falls. Another round of thunderstorms may return Friday night, though timing and severity remain uncertain.
Five Day Sioux Falls, SD Forecast:
- Thursday: Chance of thunderstorms early, then clearing. High 87°F, low 72°F.
- Friday: Mostly sunny, hot. High 90°F, low 72°F.
- Saturday: Mostly sunny, very warm. High 90°F, low 72°F.
- Sunday: Mostly sunny. High 88°F, low 68°F.
- Monday: Mostly sunny. High 83°F, low 66°F.
