Hail in Mahaska County, Iowa

Hail July 17, 2023 · Mahaska County, Iowa

1 in

Hail diameter

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

The wider storm

Convection developed in west central Iowa shortly after midnight on July 17th, developing on the nose of mid level theta-e advection and associated surface front lagging behind. Despite the timing, the environment recovered thanks to continued warm air advection, effective CAPE of over 1700 J/kg, and deep layer shear over 50 kts. Storms refired around 5 am, producing up to quarter sized hail as cells moved across southern Iowa through mid morning.

Began near Oskaloosa (41.3100, -92.6400).

Source: NOAA Storm Events Database, event 1109687. Narratives are written by the National Weather Service forecast office that issued the report.

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