Tornadoes in Grundy County
The Storm Prediction Center records 45 tornadoes whose paths touched Grundy County, Iowa between 1960 and 2025. They killed 10 people and injured 78. The busiest month is May, with 16 tornadoes. The strongest was an EF5 on 25 May 2008. The most recent was on 18 August 2025.
- 45tornadoes
- 10deaths
- 78injuries
- 897per 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 Grundy County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 14 | 31% |
| F1 / EF1 | 16 | 36% |
| F2 / EF2 | 7 | 16% |
| F3 / EF3 | 2 | 4% |
| F4 / EF4 | 2 | 4% |
| F5 / EF5 | 1 | 2% |
| Unknown rating | 3 | 7% |
Grundy 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 |
|---|---|
| 1960s | 3 |
| 1970s | 7 |
| 1980s | 4 |
| 1990s | 4 |
| 2000s | 16 |
| 2010s | 6 |
| 2020s | 5 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 3 |
| Apr | 4 |
| May | 16 |
| Jun | 6 |
| Jul | 8 |
| Aug | 4 |
| Sep | 0 |
| Oct | 1 |
| Nov | 3 |
| Dec | 0 |
Records for Grundy County
- Deadliest and Strongest: Cedar Falls, Iowa tornado25 May 2008, EF5, 9 deaths, 70 injuries, 41 miles long
- Longest path: Stanhope, Iowa tornado24 May 1989, F4, 66 miles long
- Most recent: Iowa tornado18 August 2025, Unknown rating, 4.5 miles long
Notable tornadoes in Grundy County
- Cedar Falls, Iowa tornado25 May 2008, EF5, 9 deaths, 70 injuries, 41 miles long
- Reinbeck, Iowa tornado16 April 1960, F3, 1 death, 5 injuries, 29.8 miles long
- Stanhope, Iowa tornado24 May 1989, F4, 66 miles long
- New Providence, Iowa tornado30 May 1989, F4, 3 injuries, 11 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.