Weather Alerts Map

Tornadoes in Pennsylvania

Pennsylvania has recorded 982 tornadoes from 1950 through 2025, about 17.7 per year over the last 30 years. They killed 49 people and injured 1,050. July is the most active month.

Live Pennsylvania tornado warnings · All Pennsylvania weather alerts

Map data: NWS, OpenFreeMap, OpenStreetMap

Tornadoes per year

96: 25962597: 14971498: 59985999: 999900: 500501: 12011202: 15021503: 903904: 26042605: 11051106: 806807: 707708: 508509: 709710: 17101711: 30113012: 12121213: 913914: 914915: 12151216: 916917: 29172918: 32183219: 35193520: 620621: 43214322: 722723: 24232424: 23242325: 222522
Pennsylvania tornadoes per year, 1996–2025
50s: 6150s6160s: 4060s4070s: 11670s11680s: 11980s11990s: 22290s22200s: 10500s10510s: 19410s19420s: 12520s125
Tornadoes per decade (the 2020s are partial)

When tornadoes happen in Pennsylvania

Jan: 7Jan7Feb: 6Feb6Mar: 32Mar32Apr: 88Apr88May: 171May171Jun: 191Jun191Jul: 211Jul211Aug: 115Aug115Sep: 79Sep79Oct: 42Oct42Nov: 35Nov35Dec: 5Dec5
Tornadoes by month, 1950–2025
EF0: 283EF0283EF1: 490EF1490EF2: 172EF2172EF3: 28EF328EF4: 6EF46EF5: 0EF5
Tornadoes by (E)F rating

Ratings before February 2007 use the original Fujita (F) scale; later tornadoes use the Enhanced Fujita (EF) scale. How the EF scale works.

Deadliest tornadoes in Pennsylvania

DateRatingCountyPath lengthWidthDeathsInjuries
May 31, 1985F3Beaver County39 mi243 yd9120
May 31, 1985F4Venango County29 mi800 yd730
May 31, 1985F3Lycoming County19 mi910 yd660
May 31, 1985F4Warren County29 mi1,000 yd440
July 27, 1994F3Montgomery County2 mi100 yd325
August 3, 1963F3Allegheny County0.1 mi10 yd270
May 31, 1985F3Crawford County23 mi277 yd20
June 2, 1998F3Wyoming County26 mi500 yd215
March 22, 1955F3Chester County9.6 mi600 yd10
June 18, 1970F3Lebanon County1.9 mi880 yd15

Strongest tornadoes in Pennsylvania

DateRatingCountyPath lengthWidthDeathsInjuries
May 31, 1985F4Venango County29 mi800 yd730
May 31, 1985F4Warren County29 mi1,000 yd440
May 31, 1985F4Clearfield County69 mi3,330 yd00
June 2, 1998F4—36.5 mi1,200 yd05
May 31, 1985F4—28 mi440 yd00
June 3, 1980F4Allegheny County11.8 mi10 yd0140
May 31, 1985F3Beaver County39 mi243 yd9120
May 31, 1985F3Lycoming County19 mi910 yd660
July 27, 1994F3Montgomery County2 mi100 yd325
June 2, 1998F3Wyoming County26 mi500 yd215

Most recent tornadoes

DateRatingCountyPath lengthWidthDeathsInjuries
September 4, 2025EF0Lancaster County0.2 mi30 yd00
July 1, 2025EF0Berks County0.9 mi150 yd00
June 17, 2025EF1Bedford County1.1 mi175 yd00
June 9, 2025EF2Erie County1 mi115 yd00
June 9, 2025EF0Clarion County0.2 mi25 yd00
June 9, 2025EF0Crawford County0.7 mi25 yd00
May 21, 2025EF1Washington County13.9 mi200 yd00
May 21, 2025EF0Washington County2.2 mi75 yd00
May 21, 2025EF0Butler County0.2 mi210 yd00
May 21, 2025EF0Butler County0.4 mi160 yd00

Counties with the most tornadoes

CountyTornadoes since 1950Per 1,000 sq mi
Westmoreland County50125972762.6
Lancaster County39107002118.6
Crawford County3794693675.9
York County3497411504.4
Chester County31106910785.6
Lycoming County2961114727.4
Berks County2987745327.1
Allegheny County2899342465.8
Butler County2891913815
Bucks County24102913907.3
Beaver County22130988505.7
Cambria County2282819767.4
Mercer County2284665676.1
Erie County2168072590.7
Washington County2163465577.6
Dauphin County21103600000
Bradford County2147419354.8
Luzerne County2058202247.2
Indiana County2062636033.9
Montgomery County20107246376.8

About this data

Tornado records come from the NOAA Storm Prediction Center database of confirmed tornadoes, 1950–2025. Tornadoes that crossed state lines are counted in the state where they began. Counts in the early decades are lower partly because many weak tornadoes went unreported before Doppler radar and storm spotter networks.