Hail in Osceola County, Iowa

Hail September 21, 2025 · Osceola County, Iowa

1 in

Hail diameter

Where the report was made, with tornadoes recorded within 15 miles over the years.

The wider storm

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.

Began near Allendorf (43.4300, -95.5900).

Source: NOAA Storm Events Database, event 1292875. Narratives are written by the National Weather Service forecast office that issued the report.

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