Thunderstorm Wind in Harrison County, Iowa

Thunderstorm Wind July 28, 2025 · Harrison County, Iowa

60 mph

Estimated gust (52 kt)

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

What the National Weather Service wrote

Law enforcement report of a roof blown off a home, associated with estimated 50-60 mph winds with a thunderstorm outflow boundary.

The wider storm

Early on July 28, 2025, a mesoscale convective system (MCS) tracking south across Iowa triggered a brief period of damaging winds in extreme eastern Nebraska and southwestern Iowa. An outflow boundary from the MCS pushed into the region, producing a 58 mph gust at 1:45 AM CST measured by the ASOS in Tekamah, Nebraska. Later, at 2:21 AM CST, law enforcement reported a roof blown off a home in Mondamin, Iowa. As the morning progressed, radar showed the outflow boundary weakening and becoming more diffuse, leading to no additional severe weather reports.

Began near Mondamin (41.7100, -96.0200).

Source: NOAA Storm Events Database, event 1282502. Narratives are written by the National Weather Service forecast office that issued the report.

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