Thunderstorm Wind — Charles Mix, South Dakota

2025-06-27 · near Academy, Charles Mix, South Dakota

Event narrative

Thunderstorm wind gusts measured by SD RWIS Platte-Winner Bridge.

Wider weather episode

Thunderstorms developed along a nearly stationary pre-frontal boundary during the early evening across south central South Dakota. As cold pool development forced storms eastward off the initiating boundary into an environment with appreciable DCAPE and deep-layer shear of 40 to 50 knots, thunderstorms organized into a small bowing segment, which plowed east and southeast with up to nearly 90 mph winds. After several hours, storms moved into a less favorable environment with both lesser shear and instability toward the James River Valley and weakened.

View location on OpenStreetMap → (43.3900, -99.1200)

Source: NOAA Storm Events Database, event_id 1278572. Narrative written by the NWS forecast office that issued the report.