Thunderstorm Wind in Poweshiek County, Iowa

Thunderstorm Wind in Poweshiek County, Iowa: 145 recorded events between 1960 and 2025. The strongest on record measured 91. That places the county #1,594 nationally and #51 statewide for this hazard.

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for thunderstorm wind in Poweshiek County is the 2000s, when 53 of the county's 145 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Poweshiek County archive, thunderstorm wind makes up 39.1% of all recorded severe weather across 8 hazard types. Nationally the county sits at #1,594 for this hazard and #51 within Iowa, putting it in the 49.3 percentile of all U.S. counties.

Jun is the peak month for thunderstorm wind in Poweshiek County with 50 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

• Hail 93
• Heavy Rain 63

Written by National Weather Service staff at the time of the event · public domain

How many thunderstorm wind events are on record in Poweshiek County, Iowa?

145 thunderstorm wind events are recorded in Poweshiek County between 1960 and 2025, causing 1 direct deaths.

What is the strongest thunderstorm wind recorded in Poweshiek County?

The strongest thunderstorm wind on record in Poweshiek County measured 91.

Where does the thunderstorm wind data for Poweshiek County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.