23,202
Recorded events
67
Counties affected
43
Direct deaths
$289.1M
Property damage
Pennsylvania thunderstorm wind history: 23,202 recorded events across 67 counties between 1955 and 2026.
Decade by decade
Pennsylvania thunderstorm wind history by decade
The 2010s are the busiest decade on record with 6,740 reported thunderstorm wind events across Pennsylvania. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.
County ranking
Counties with the most thunderstorm wind events in Pennsylvania
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | Allegheny County | 1,248 | 1 | $69.0M | 1955–2026 |
| #2 | Westmoreland County | 1,013 | 3 | $10.1M | 1958–2026 |
| #3 | Berks County | 860 | 0 | $2.8M | 1960–2026 |
| #4 | Chester County | 769 | 3 | $6.4M | 1957–2026 |
| #5 | Washington County | 633 | 0 | $4.6M | 1961–2026 |
| #6 | Montgomery County | 623 | 3 | $3.0M | 1956–2026 |
| #7 | Lancaster County | 608 | 3 | $10.1M | 1955–2026 |
| #8 | York County | 583 | 2 | $7.8M | 1955–2026 |
| #9 | Butler County | 560 | 1 | $17.0M | 1961–2026 |
| #10 | Mercer County | 519 | 0 | $6.3M | 1956–2026 |
| #11 | Beaver County | 502 | 2 | $12.6M | 1963–2026 |
| #12 | Bucks County | 494 | 0 | $1.3M | 1960–2026 |
| #13 | Crawford County | 483 | 1 | $9.8M | 1955–2026 |
| #14 | Fayette County | 459 | 0 | $5.0M | 1965–2026 |
| #15 | Centre County | 434 | 0 | $2.0M | 1957–2026 |
| #16 | Lycoming County | 432 | 2 | $3.0M | 1966–2026 |
| #17 | Indiana County | 412 | 0 | $2.7M | 1955–2026 |
| #18 | Lehigh County | 395 | 0 | $1.6M | 1964–2026 |
| #19 | Erie County | 394 | 1 | $5.8M | 1956–2026 |
| #20 | Clearfield County | 393 | 0 | $9.1M | 1965–2026 |
| #21 | Northampton County | 389 | 1 | $3.4M | 1958–2026 |
| #22 | Venango County | 386 | 1 | $3.1M | 1965–2026 |
| #23 | Dauphin County | 381 | 0 | $3.0M | 1960–2026 |
| #24 | Jefferson County | 380 | 0 | $4.6M | 1955–2026 |
| #25 | Cambria County | 359 | 1 | $1.2M | 1955–2026 |
Significant events
Deadliest thunderstorm wind events in Pennsylvania
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| Sep 22, 2010 | Lycoming County | — | 2 | 0 |
| Jun 1, 1985 | Beaver County | — | 2 | 0 |
| Jul 18, 2006 | Chester County | — | 2 | 1 |
| Dec 19, 2025 | Philadelphia County | — | 2 | 0 |
| Jul 6, 2019 | Clinton County | — | 1 | 2 |
| Jul 1, 2025 | Lancaster County | — | 1 | 0 |
| Jul 26, 2012 | Potter County | — | 1 | 1 |
| Jun 23, 2015 | Warren County | — | 1 | 4 |
| Jun 30, 1987 | Adams County | — | 1 | 0 |
| Jun 10, 1999 | Crawford County | — | 1 | 1 |
All hazards in Pennsylvania · Thunderstorm Wind across the U.S.