Sioux Falls, South Dakota – Severe thunderstorms may develop across parts of South Dakota and Minnesota Monday afternoon and evening, prompting early safety preparations across the region. Cities including Sioux Falls, Brookings, and Mankato fall within a 30% risk zone for damaging winds, large hail, and possible tornadoes.
According to the National Weather Service in Sioux Falls, a surge of warm, moist air ahead of a strong cold front will set the stage for severe weather beginning Monday afternoon. Storms could linger into the evening hours, with the greatest concentration expected across southeastern South Dakota, southwestern Minnesota, and northwestern Iowa.
Thunderstorm development will likely begin along and ahead of the approaching front, with atmospheric conditions favorable for isolated supercells. Localized flash flooding, downed power lines, and hazardous travel are possible. Interstate 29 and Highway 14 could be affected during peak commute times.
Residents in the affected area should review severe weather safety plans now, charge devices, and be prepared to take shelter quickly. Monitor NOAA Weather Radio or local alerts closely through the weekend, as timing and storm intensity could shift.
Additional updates are expected by Sunday night. Weather watches and warnings may be issued as early as Monday morning.
