Thunderstorm Wind — Osceola, Iowa

2025-06-11 · near Allendorf, Osceola, Iowa

Event narrative

Three-quarters of a mile of power poles were knocked down by thunderstorm wind gusts along 170th Street.

Wider weather episode

As a subtle mid-level impulse worked eastward across the region, a couple of multicell thunderstorm clusters developed during the early to mid afternoon across northwest Iowa near and to the north of the surface boundary. With mixed-layer instability of 1500-2000 J/kg and deep-layer shear of 35-40 knots, organized storms developed and utilized an inverted-V thermodynamic profile to accentuate a swath of damaging wind gusts near and just south of Iowa State Highway 9.

View location on OpenStreetMap → (43.4000, -95.6500)

Source: NOAA Storm Events Database, event_id 1278318. Narrative written by the NWS forecast office that issued the report.