Thunderstorm Wind — Charles Mix, South Dakota

2025-07-09 · near Platte, Charles Mix, South Dakota

Event narrative

Winds measured by a personal weather station.

Wider weather episode

A quick-moving short wave acted upon an environment of 2000 to 3000 J/kg of instability and 25 to 30 kts of bulk shear to generate an eastward moving line of thunderstorms across central and southeast South Dakota during the late evening of July 9 and into the early overnight hours of July 10. With waning instability, the thunderstorms weakened as they approached the I-29 corridor, but still produced scattered severe wind gusts up to 70 mph and hail up to 1 inch in diameter.

View location on OpenStreetMap → (43.3000, -98.9600)

Source: NOAA Storm Events Database, event_id 1287148. Narrative written by the NWS forecast office that issued the report.