Hail — O'brien, Iowa

2025-09-16 · near Hartley, O'brien, Iowa

Event narrative

Hail was mostly pea to dime size, but several stones were from quarter up to golf ball size.

Wider weather episode

With less than 10 knots of deep-layer shear, isolated thunderstorms were very slow moving along existing outflow boundaries and resulted in several complimentary boundary interactions. One such interaction resulted in a stronger and more persistent updraft, with hail up to half-dollar size for a brief time.

View location on OpenStreetMap → (43.2200, -95.5100)

Source: NOAA Storm Events Database, event_id 1292621. Narrative written by the NWS forecast office that issued the report.