Tornadoes in Harrison County
The Storm Prediction Center records 39 tornadoes whose paths touched Harrison County, Iowa between 1967 and 2024. They killed 7 people and injured 76. The busiest month is June, with 15 tornadoes. The strongest was an EF4 on 26 April 2024. The most recent was on 24 May 2024.
- 39tornadoes
- 7deaths
- 76injuries
- 560per 10,000 sq mi of land
A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.
How strong were the tornadoes in Harrison County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 14 | 36% |
| F1 / EF1 | 11 | 28% |
| F2 / EF2 | 6 | 15% |
| F3 / EF3 | 6 | 15% |
| F4 / EF4 | 1 | 3% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 1 | 3% |
Harrison County tornadoes over time
The 2020s only run to 2024, so that bar is for a shorter period. The record starts in 1950.
Show the numbers
| Period | Count |
|---|---|
| 1960s | 3 |
| 1970s | 3 |
| 1980s | 5 |
| 1990s | 6 |
| 2000s | 8 |
| 2010s | 4 |
| 2020s | 10 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 2 |
| Apr | 10 |
| May | 9 |
| Jun | 15 |
| Jul | 1 |
| Aug | 0 |
| Sep | 2 |
| Oct | 0 |
| Nov | 0 |
| Dec | 0 |
Records for Harrison County
- Deadliest: Little Sioux, Iowa tornado11 June 2008, EF3, 4 deaths, 48 injuries, 13 miles long
- Strongest: Yutan, Nebraska tornado26 April 2024, EF4, 4 injuries, 31.9 miles long
- Longest path: McClelland, Iowa tornado26 April 2024, EF3, 1 death, 3 injuries, 40.3 miles long
- Most recent: Iowa tornado24 May 2024, EF1, 0.7 miles long
Notable tornadoes in Harrison County
- Little Sioux, Iowa tornado11 June 2008, EF3, 4 deaths, 48 injuries, 13 miles long
- Missouri Valley, Iowa tornado16 May 1999, F3, 2 deaths, 16 injuries, 7.5 miles long
- McClelland, Iowa tornado26 April 2024, EF3, 1 death, 3 injuries, 40.3 miles long
- Yutan, Nebraska tornado26 April 2024, EF4, 4 injuries, 31.9 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.