Hail — Yankton, South Dakota

2025-06-16 · near Napa, Yankton, South Dakota

Wider weather episode

Thunderstorms developed along a stout outflow boundary, which dropped southward into the area through the day. The boundary served as a gradient in shear and instability, and focused initial development during the afternoon hours, which featured hail up to golf ball size. Storms evolved to produce a couple tracks of damaging wind heading southeast across northeast Nebraska and northwest Iowa into very early evening.

View location on OpenStreetMap → (42.9100, -97.4000)

Source: NOAA Storm Events Database, event_id 1278361. Narrative written by the NWS forecast office that issued the report.