Tornadoes in Brown County
The Storm Prediction Center records 90 tornadoes whose paths touched Brown County, South Dakota between 1953 and 2025. They killed 3 people and injured 35. The busiest month is June, with 42 tornadoes. The strongest was an F4 on 23 June 2002. The most recent was on 13 July 2025.
- 90tornadoes
- 3deaths
- 35injuries
- 525per 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 Brown County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 63 | 70% |
| F1 / EF1 | 12 | 13% |
| F2 / EF2 | 8 | 9% |
| F3 / EF3 | 6 | 7% |
| F4 / EF4 | 1 | 1% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 0 | 0% |
Brown 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 | 8 |
| 1960s | 9 |
| 1970s | 17 |
| 1980s | 18 |
| 1990s | 14 |
| 2000s | 15 |
| 2010s | 4 |
| 2020s | 5 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 2 |
| May | 23 |
| Jun | 42 |
| Jul | 16 |
| Aug | 7 |
| Sep | 0 |
| Oct | 0 |
| Nov | 0 |
| Dec | 0 |
Records for Brown County
- Deadliest: Warner, South Dakota tornado1 July 1973, F3, 1 death, 3 injuries, 0.3 miles long
- Strongest: Westport, South Dakota tornado23 June 2002, F4, 9 miles long
- Longest path: Groton, South Dakota tornado21 June 1961, F3, 1 death, 7 injuries, 156.3 miles long
- Most recent: South Dakota tornado13 July 2025, EF0, 0.1 miles long
Notable tornadoes in Brown County
- Groton, South Dakota tornado21 June 1961, F3, 1 death, 7 injuries, 156.3 miles long
- Warner, South Dakota tornado1 July 1973, F3, 1 death, 3 injuries, 0.3 miles long
- Westport, South Dakota tornado23 June 2002, F4, 9 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.