Hail — Audubon, Iowa

2023-07-17 · near Audubon, Audubon, Iowa

Event narrative

Nickel sized hail lasted for 10 minutes.

Wider weather episode

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.

View location on OpenStreetMap → (41.7200, -94.9300)

Source: NOAA Storm Events Database, event_id 1109681. Narrative written by the NWS forecast office that issued the report.