100
Recorded events
0
Direct deaths
0
Direct injuries
$2.1M
Property damage
Thunderstorm Wind in Osceola County, Iowa: 100 recorded events between 1964 and 2025. The strongest on record measured 78. That places the county #2,218 nationally and #84 statewide for this hazard.
Decade by decade
Thunderstorm Wind in Osceola County, Iowa: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for thunderstorm wind in Osceola County is the 2000s, when 31 of the county's 100 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 Osceola County archive, thunderstorm wind makes up 38.2% of all recorded severe weather across 8 hazard types. Nationally the county sits at #2,218 for this hazard and #84 within Iowa, putting it in the 29.6 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for thunderstorm wind in Osceola County with 39 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.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jul 29, 2025 | MAY CITY | 50 | $0 |
| Jul 29, 2025 | ASHTON | 70 | $0 |
| Jun 11, 2025 | MAY CITY | 52 | $0 |
| Jun 11, 2025 | HARRIS | 52 | $0 |
| Jun 11, 2025 | SIBLEY | 53 | $0 |
| Jun 11, 2025 | ALLENDORF | 74 | $0 |
| Jun 11, 2025 | ALLENDORF | 65 | $0 |
| Jun 11, 2025 | SIBLEY | 72 | $0 |
| Jun 11, 2025 | SIBLEY | 65 | $0 |
| Jun 11, 2025 | SIBLEY | 61 | $0 |
Other hazards here
More from Osceola County
- Hail 120
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Numerous thunderstorms developed in the strong, moist southerly flow ahead of an approaching cold front. Many of them produced pea to marble-size hail and gusty winds of 40 to 50 MPH. One of the cells became severe and produced winds strong enough to take down power lines and one utility pole east of Akron. During the late evening hours, the thunderstorms weakened and collapsed. As the tops collapsed, high winds affected Osceola County. Trees were toppled and power lines downed. Several out buildings were toppled as well. A machine shed, on a farmstead west of May City, was picked up and hurled 100 feet from its foundation. The building was destroyed. Some minor damage was also done to the farmhouse as well. Trees and power lines were also downed on a farmstead east of Ocheyedan. A machine shed was also destroyed by high winds there.
Severe damage done to several grain bins. The bolts holding the empty bins in place were broken off and the bins were lifted or shifted from their original position. The top collapsed on the northwest side of the empty bins.
Numerous thunderstorms developed in the strong, moist southerly flow ahead of an approaching cold front. Many of them produced pea to marble-size hail and gusty winds of 40 to 50 MPH. One of the cells became severe and produced winds strong enough to take down power lines and one utility pole east of Akron. During the late evening hours, the thunderstorms weakened and collapsed. As the tops collapsed, high winds affected Osceola County. Trees were toppled and power lines downed. Several out buildings were toppled as well. A machine shed, on a farmstead west of May City, was picked up and hurled 100 feet from its foundation. The building was destroyed. Some minor damage was also done to the farmhouse as well. Trees and power lines were also downed on a farmstead east of Ocheyedan. A machine shed was also destroyed by high winds there.
Quick answers
Frequently asked
How many thunderstorm wind events are on record in Osceola County, Iowa?
100 thunderstorm wind events are recorded in Osceola County between 1964 and 2025, causing 0 direct deaths.
What is the strongest thunderstorm wind recorded in Osceola County?
The strongest thunderstorm wind on record in Osceola County measured 78.
Where does the thunderstorm wind data for Osceola 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 Osceola County, Iowa.” Severe Weather History. severeweatherhistory.com/county/iowa/osceola-county/thunderstorm-wind/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.