Hail — Osceola, Iowa

2025-09-21 · near Allendorf, Osceola, Iowa

Wider weather episode

A weak mid-level wave dropped slowly southeast across northern Minnesota on the afternoon and evening of September 21 and into an environment with 35 kts of deep-layer shear and 1000-1500 J/kg MUCAPE. Scattered slow-moving thunderstorms developed in the vicinity of a diffuse warm frontal boundary and produced hail up to 1.75 to 2 inches in diameter.

View location on OpenStreetMap → (43.4300, -95.5900)

Source: NOAA Storm Events Database, event_id 1292875. Narrative written by the NWS forecast office that issued the report.