Hail — Sioux, Iowa

2025-09-21 · near Lebanon, Sioux, 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 → (43.1000, -96.4100)

Source: NOAA Storm Events Database, event_id 1292874. Narrative written by the NWS forecast office that issued the report.