Tornadoes in Hamlin County
The Storm Prediction Center records 27 tornadoes whose paths touched Hamlin County, South Dakota between 1953 and 2025. They killed 1 person and injured 20. The busiest month is June, with 10 tornadoes. The strongest was an F3 on 21 June 1961. The most recent was on 16 August 2025.
- 27tornadoes
- 1death
- 20injuries
- 533per 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 Hamlin County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 15 | 56% |
| F1 / EF1 | 6 | 22% |
| F2 / EF2 | 4 | 15% |
| F3 / EF3 | 2 | 7% |
| F4 / EF4 | 0 | 0% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 0 | 0% |
Hamlin 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 | 1 |
| 1980s | 8 |
| 1990s | 5 |
| 2000s | 2 |
| 2010s | 2 |
| 2020s | 4 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 1 |
| May | 8 |
| Jun | 10 |
| Jul | 5 |
| Aug | 1 |
| Sep | 1 |
| Oct | 1 |
| Nov | 0 |
| Dec | 0 |
Records for Hamlin County
- Deadliest and Strongest and Longest path: Groton, South Dakota tornado21 June 1961, F3, 1 death, 7 injuries, 156.3 miles long
- Most recent: South Dakota tornado16 August 2025, EF0, 2.5 miles long
Notable tornadoes in Hamlin County
- Groton, South Dakota tornado21 June 1961, F3, 1 death, 7 injuries, 156.3 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.