140
Recorded events
0
Direct deaths
14
Direct injuries
$996K
Property damage
Thunderstorm Wind in Iowa County, Iowa: 140 recorded events between 1960 and 2026. The strongest on record measured 78. That places the county #1,658 nationally and #54 statewide for this hazard.
Decade by decade
Thunderstorm Wind in Iowa County, Iowa: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for thunderstorm wind in Iowa County is the 2010s, when 45 of the county's 140 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 Iowa County archive, thunderstorm wind makes up 38.0% of all recorded severe weather across 9 hazard types. Nationally the county sits at #1,658 for this hazard and #54 within Iowa, putting it in the 47.5 percentile of all U.S. counties.
Seasonality
Events by month
May is the peak month for thunderstorm wind in Iowa County with 37 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.
Significant events
Deadliest on record
| Date | Location | Scale | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Jun 29, 1998 | COUNTYWIDE | 70 | 0 | 9 | $800K |
| Aug 5, 1989 | 50 | 0 | 2 | $0 | |
| May 26, 2008 | MILLERSBURG | 56 | 0 | 1 | $10K |
| Sep 8, 2001 | WILLIAMSBURG | 52 | 0 | 1 | $0 |
| Jun 14, 2001 | VICTOR | 52 | 0 | 1 | $0 |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Apr 2, 2026 | PARNELL | 56 | $0 |
| Aug 15, 2025 | EAST AMANA | 63 | $0 |
| Mar 15, 2025 | MARENGO | 56 | $0 |
| Jul 15, 2024 | LADORA | 61 | $0 |
| Jul 3, 2024 | NORTH ENGLISH | 50 | $0 |
| Jul 2, 2024 | NORTH ENGLISH | 70 | $0 |
| Jul 2, 2024 | NORTH ENGLISH | 61 | $0 |
| Jul 2, 2024 | MILLERSBURG | 61 | $0 |
| May 27, 2024 | MILLERSBURG | 50 | $0 |
| May 24, 2024 | NORTH ENGLISH | 61 | $0 |
Other hazards here
More from Iowa County
- Hail 125
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Winds estimated to be 65 mph destroyed a machine shed a couple of miles southwest of Millersburg, IA around 11:15 pm on May 25th. According to emergency management officials, a man was injured and taken to a hospital after being hit by a tree limb.
Widespread straight-line winds that produced extensive damage were reported throughout Iowa County, associated with a derecho. These winds lasted around an hour in total at any one location, even though the initial line of storms moved out quickly. Damaging straight-line winds continued and were associated with the rear inflow jet. Maximum wind speeds were estimated to be 60 to 80 MPH for much of the county, with areas in northern Iowa County that had wind speed estimates that were 80 MPH or higher. These estimates were determined based off damage reports and photos submitted through social media. These strong winds and duration extensively damaged most trees, powerlines, crops, and some structures in their path. This also resulted in long duration power outages.
Power poles were snapped and blown down for three quarters of a mile. This is the middle of a path that is about 1 mile wide. There is also widespread tree damage in this area with some trees snapped and crops blown down in this area.
Quick answers
Frequently asked
How many thunderstorm wind events are on record in Iowa County, Iowa?
140 thunderstorm wind events are recorded in Iowa County between 1960 and 2026, causing 0 direct deaths.
What is the strongest thunderstorm wind recorded in Iowa County?
The strongest thunderstorm wind on record in Iowa County measured 78.
Where does the thunderstorm wind data for Iowa 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.
Cite this page
“Thunderstorm Wind in Iowa County, Iowa.” Severe Weather History. severeweatherhistory.com/county/iowa/iowa-county/thunderstorm-wind/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.