Tornadoes in Allegheny County
The Storm Prediction Center records 29 tornadoes whose paths touched Allegheny County, Pennsylvania between 1954 and 2024. They killed 2 people and injured 275. The busiest month is June, with 10 tornadoes. The strongest was an F4 on 3 June 1980. The most recent was on 20 November 2024.
- 29tornadoes
- 2deaths
- 275injuries
- 397per 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 Allegheny County?
| Rating | Tornadoes | Share |
|---|---|---|
| F0 / EF0 | 12 | 41% |
| F1 / EF1 | 11 | 38% |
| F2 / EF2 | 3 | 10% |
| F3 / EF3 | 1 | 3% |
| F4 / EF4 | 1 | 3% |
| F5 / EF5 | 0 | 0% |
| Unknown rating | 1 | 3% |
Allegheny County tornadoes over time
The 2020s only run to 2024, so that bar is for a shorter period. The record starts in 1950.
Show the numbers
| Period | Count |
|---|---|
| 1950s | 2 |
| 1960s | 1 |
| 1970s | 5 |
| 1980s | 3 |
| 1990s | 3 |
| 2000s | 2 |
| 2010s | 2 |
| 2020s | 11 |
Show the numbers
| Period | Count |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 2 |
| May | 6 |
| Jun | 10 |
| Jul | 3 |
| Aug | 2 |
| Sep | 1 |
| Oct | 3 |
| Nov | 2 |
| Dec | 0 |
Records for Allegheny County
- Deadliest: West Mifflin, Pennsylvania tornado3 August 1963, F3, 2 deaths, 70 injuries, 0.1 miles long
- Strongest: Brackenridge, Pennsylvania tornado3 June 1980, F4, 140 injuries, 11.8 miles long
- Longest path: Pennsylvania tornado4 June 1975, F2, 45.3 miles long
- Most recent: Pennsylvania tornado20 November 2024, EF0, 1 mile long
Notable tornadoes in Allegheny County
- West Mifflin, Pennsylvania tornado3 August 1963, F3, 2 deaths, 70 injuries, 0.1 miles long
- Brackenridge, Pennsylvania tornado3 June 1980, F4, 140 injuries, 11.8 miles long
Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.