Hail — Gregory, South Dakota

2025-08-03 · near Gregory, Gregory, South Dakota

Wider weather episode

Relatively weak shear, less than 1500 J/kg MUCAPE, and deep layer shear less than 30 knots led to slow-moving storms with limited longevity. One stronger storm along a surface boundary west of the Missouri River dropped large hail up to quarter size across Gregory County.

View location on OpenStreetMap → (43.2400, -99.4300)

Source: NOAA Storm Events Database, event_id 1290350. Narrative written by the NWS forecast office that issued the report.