119
Recorded events
0
Direct deaths
17
Direct injuries
$1.7M
Property damage
Thunderstorm Wind in Hancock County, Iowa: 119 recorded events between 1956 and 2025. The strongest on record measured 87. That places the county #1,945 nationally and #71 statewide for this hazard.
Decade by decade
Thunderstorm Wind in Hancock County, Iowa: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for thunderstorm wind in Hancock County is the 2010s, when 41 of the county's 119 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 Hancock County archive, thunderstorm wind makes up 37.4% of all recorded severe weather across 8 hazard types. Nationally the county sits at #1,945 for this hazard and #71 within Iowa, putting it in the 38.1 percentile of all U.S. counties.
Seasonality
Events by month
Jul is the peak month for thunderstorm wind in Hancock County with 35 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 |
|---|---|---|---|---|---|
| Apr 27, 1991 | 87 | 0 | 16 | $0 | |
| Jun 6, 1999 | CORWITH | 56 | 0 | 1 | $25K |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jul 29, 2025 | MILLER | 56 | $0 |
| Jul 29, 2025 | GARNER | 56 | $10K |
| Jul 29, 2025 | HAYFIELD | 50 | $0 |
| Jul 28, 2025 | BRITT | 54 | $0 |
| Jul 28, 2025 | GARNER | 56 | $15K |
| Jul 28, 2025 | BRITT | 58 | $3K |
| Jul 28, 2025 | KANAWHA | 57 | $0 |
| Jul 24, 2025 | CORWITH | 56 | $3K |
| Jun 20, 2025 | KANAWHA | 54 | $0 |
| May 21, 2024 | DUNCAN | 61 | $100K |
Other hazards here
More from Hancock County
- Hail 114
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Storm chaser video depicted extensive wind damage and likely wind driven hail damage in the town of Klemme. Damage included numerous car, home, and business windows broken and trees downed on homes. This is a delayed report and time estimated from radar.
Emergency manager reported significant wind-driven hail damage to corn and bean fields between Britt and Klemme. Golf ball or larger hail and 70 to 80 mph winds pulverized 5 to 6 foot cornstalks to stubble. Trees and power lines also downed.
A thunderstorms moved across Kossuth and Hancock Counties. Though there was no history of severe weather with them. An apparent downburst blew into the town of Swea City. There were many trees downed by the winds and power was knocked out in a few areas. Another cell caused similar damage in Britt.
Quick answers
Frequently asked
How many thunderstorm wind events are on record in Hancock County, Iowa?
119 thunderstorm wind events are recorded in Hancock County between 1956 and 2025, causing 0 direct deaths.
What is the strongest thunderstorm wind recorded in Hancock County?
The strongest thunderstorm wind on record in Hancock County measured 87.
Where does the thunderstorm wind data for Hancock 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 Hancock County, Iowa.” Severe Weather History. severeweatherhistory.com/county/iowa/hancock-county/thunderstorm-wind/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.