Tornadoes in Mercer County
The Storm Prediction Center records 24 tornadoes whose paths touched Mercer County, North Dakota between 1956 and 2025. None of them is recorded as having killed anyone. The busiest month is July, with 10 tornadoes. The strongest was an F3 on 18 June 1956. The most recent was on 30 August 2025.
- 24tornadoes
- 0deaths
- 8injuries
- 230per 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 Mercer County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 12 | 50% |
| F1 / EF1 | 9 | 38% |
| F2 / EF2 | 1 | 4% |
| F3 / EF3 | 1 | 4% |
| F4 / EF4 | 0 | 0% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 1 | 4% |
Mercer 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 | 1 |
| 1960s | 4 |
| 1970s | 5 |
| 1980s | 2 |
| 1990s | 6 |
| 2010s | 5 |
| 2020s | 1 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 0 |
| May | 2 |
| Jun | 6 |
| Jul | 10 |
| Aug | 5 |
| Sep | 0 |
| Oct | 1 |
| Nov | 0 |
| Dec | 0 |
Records for Mercer County
- Strongest: North Dakota tornado18 June 1956, F3, 1 injury, 10.6 miles long
- Longest path: North Dakota tornado24 May 1975, F2, 5 injuries, 33.7 miles long
- Most recent: North Dakota tornado30 August 2025, Unknown rating, 0.5 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.