Thunderstorm Wind in Clay County, Iowa

Thunderstorm Wind June 30, 2026 · Clay County, Iowa

66 mph

Measured gust (57 kt)

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

What the National Weather Service wrote

Thunderstorm wind gusts were measured by the Automated Surface Observing System site at the Spencer Airport.

The wider storm

As a mid-level wave moved out of Nebraska toward southeast South Dakota during the overnight, convective clusters blossomed near and ahead of a frontal boundary with MUCAPE from 2000-3000 J/kg and effective shear of up to 50 knots. Initial, more isolated storms produced hail across northeast Nebraska up to golf ball size, but quickly evolved into bowing segments with damaging wind gusts mainly from 60 to 90 mph across northwest Iowa and southwest Minnesota.

Began near (3se)spencer Muni Ar (43.1700, -95.2100).

Source: NOAA Storm Events Database, event 1351228. Narratives are written by the National Weather Service forecast office that issued the report.

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