Thunderstorm Wind — Yankton, South Dakota

2025-06-27 · near Napa, Yankton, South Dakota

Event narrative

An extended period of severe wind gusts was measured by a personal weather station, with the peak wind gust at 2219 CST.

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 → (42.8701, -97.4596)

Source: NOAA Storm Events Database, event_id 1278618. Narrative written by the NWS forecast office that issued the report.