Hail — Grundy, Iowa
2025-09-22 · near Dike, Grundy, Iowa
1
Magnitude
Event narrative
Quarter sized hail reported by trained spotter.
Wider weather episode
Storms developed in late afternoon along a boundary across northern Iowa, then sunk south through the evening. Storms were able to organize into a more cohesive line with 2000+ J/kg of MLCAPE and around 30 kts of shear. Storms initially resulted in a number of quarter sized hail reports, then transitions to wind damage as the cold pool surged south ahead of the line through the evening.
View location on OpenStreetMap → (42.4300, -92.6300)
Source: NOAA Storm Events Database, event_id 1297887. Narrative written by the NWS forecast office that issued the report.