Thunderstorm Wind in Sioux County, Iowa

Thunderstorm Wind June 17, 2026 · Sioux County, Iowa

64 mph

Estimated gust (56 kt)

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

What the National Weather Service wrote

Thunderstorm winds downed tree limbs up to 5 1/2 inches in diameter.

The wider storm

Scattered afternoon thunderstorms developed along weak convergence in deep cyclonic flow, and despite weak MLCAPE up to 250-500 J/kg, very strong 850-700 hPa winds led to strong outflows on decaying storms with gusts locally 60 to 70 mph.

Began near Rock Vly (43.2000, -96.3000).

Source: NOAA Storm Events Database, event 1346761. Narratives are written by the National Weather Service forecast office that issued the report.

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