236
Recorded events
0
Direct deaths
7
Direct injuries
$3.6M
Property damage
Thunderstorm Wind in Marion County, Iowa: 236 recorded events between 1971 and 2025. The strongest on record measured 87. That places the county #768 nationally and #18 statewide for this hazard.
Decade by decade
Thunderstorm Wind in Marion County, Iowa: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for thunderstorm wind in Marion County is the 2010s, when 95 of the county's 236 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 Marion County archive, thunderstorm wind makes up 33.2% of all recorded severe weather across 8 hazard types. Nationally the county sits at #768 for this hazard and #18 within Iowa, putting it in the 75.5 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for thunderstorm wind in Marion County with 77 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 28, 1986 | 61 | 0 | 6 | $0 | |
| Aug 20, 2019 | RED ROCK | 56 | 0 | 1 | $20K |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jun 20, 2025 | PELLA | 52 | $0 |
| Mar 14, 2025 | KNOXVILLE | 61 | $8K |
| Jul 31, 2024 | NEWBERN | 54 | $0 |
| Jul 30, 2024 | PELLA MUNI ARPT | 50 | $0 |
| Jul 30, 2024 | PELLA | 50 | $0 |
| Jul 30, 2024 | HARVEY | 55 | $0 |
| Jul 15, 2024 | PELLA MUNI ARPT | 61 | $0 |
| Jul 15, 2024 | OTLEY | 65 | $0 |
| Jun 25, 2024 | PLEASANTVILLE | 52 | $0 |
| May 24, 2024 | PELLA | 50 | $0 |
Other hazards here
More from Marion County
- Hail 196
- Heavy Rain 107
- Flood 63
- Tornado 47
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
A large egg laying building was destroyed south of Knoxville along Highway 14. The storm moved the south end of the building roughly 40 feet off of its foundation. The walls were anchored into the concrete floor. Time estimated from radar.
Emergency manager reported upwards of 25 or so trees and or limbs downed onto roadways, with one on top of a passenger car. Power lines were also down around the area and a transformer was on fire from sustained damage.
Emergency management relayed widespread crop damage including being stripped or blown over from roughly the Marion County – Warren County line east to 20th Place and McKinber St. There was also significant tree damage and power lines down in the area with damage to a residence including a camper and garage. Time estimated via radar.
Quick answers
Frequently asked
How many thunderstorm wind events are on record in Marion County, Iowa?
236 thunderstorm wind events are recorded in Marion County between 1971 and 2025, causing 0 direct deaths.
What is the strongest thunderstorm wind recorded in Marion County?
The strongest thunderstorm wind on record in Marion County measured 87.
Where does the thunderstorm wind data for Marion 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 Marion County, Iowa.” Severe Weather History. severeweatherhistory.com/county/iowa/marion-county/thunderstorm-wind/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.