Tornadoes in Boone County
The Storm Prediction Center records 61 tornadoes whose paths touched Boone County, Iowa between 1953 and 2025. They killed 2 people and injured 101. The busiest month is June, with 18 tornadoes. The strongest was an F5 on 13 June 1976. The most recent was on 19 July 2025.
- 61tornadoes
- 2deaths
- 101injuries
- 1,069per 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 Boone County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 23 | 38% |
| F1 / EF1 | 14 | 23% |
| F2 / EF2 | 14 | 23% |
| F3 / EF3 | 4 | 7% |
| F4 / EF4 | 1 | 2% |
| F5 / EF5 | 1 | 2% |
| Unknown rating | 4 | 7% |
Boone County tornadoes over time
The 2020s only run to 2025, so that bar is for a shorter period. The record starts in 1950.
Show the numbers
| Period | Count |
|---|---|
| 1950s | 4 |
| 1960s | 6 |
| 1970s | 5 |
| 1980s | 4 |
| 1990s | 13 |
| 2000s | 14 |
| 2010s | 7 |
| 2020s | 8 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 5 |
| Apr | 9 |
| May | 14 |
| Jun | 18 |
| Jul | 5 |
| Aug | 3 |
| Sep | 0 |
| Oct | 1 |
| Nov | 4 |
| Dec | 2 |
Records for Boone County
- Deadliest: Boxholm, Iowa tornado12 November 2005, F3, 1 death, 3 injuries, 17.6 miles long
- Strongest: Ames, Iowa tornado13 June 1976, F5, 9 injuries, 21.3 miles long
- Longest path: Gilbert, Iowa tornado20 May 1953, F3, 1 death, 116.1 miles long
- Most recent: Iowa tornado19 July 2025, Unknown rating, 4.5 miles long
Notable tornadoes in Boone County
- Gilbert, Iowa tornado20 May 1953, F3, 1 death, 116.1 miles long
- Boxholm, Iowa tornado12 November 2005, F3, 1 death, 3 injuries, 17.6 miles long
- Ames, Iowa tornado13 June 1976, F5, 9 injuries, 21.3 miles long
- Adair, Iowa tornado10 May 1959, F4, 1 injury, 41.1 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.