Thunderstorm Wind in Osceola County, Iowa

Thunderstorm Wind June 11, 2025 · Osceola County, Iowa

83 mph

Measured gust (72 kt)

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

What the National Weather Service wrote

Wind initially hit severe levels at 1300CST with a peak wind of 83 mph recorded at 1310CST at mesonet station RSYI4 near Sibley.

The wider storm

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.

Began near Sibley (43.4300, -95.7100).

Source: NOAA Storm Events Database, event 1278297. Narratives are written by the National Weather Service forecast office that issued the report.

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