Allegheny County, Pennsylvania tornadoes

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28confirmed tornadoes since NOAA records began in 1950 (the first here in 1954). Most recent: November 20, 2024, EF0. 2026 so far: 0 preliminary reports preliminary

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Map

Every tornado path in the county

Tornado paths, 1950 to 2025
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(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5Unrated

Each path is a straight line from where the tornado started to where it ended, which is all most NOAA records hold. Tap a path for its details.

Recent warnings

Recent warnings in Allegheny County

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The record

At a glance

Total281950 to 2025
Per year0.4average since 1950
Peak monthJune10 of 28
StrongestF4Jun 3, 1980
Deaths2whole paths, see note
Injuries275whole paths, see note

Deaths and injuries are NOAA's totals for each tornado's whole path, which can extend beyond Allegheny County.

Seasons

When tornadoes hit here

By month

100 Jan: 0Feb: 0Mar: 0Apr: 2May: 6Jun: 10Jul: 3Aug: 2Sep: 1Oct: 2Nov: 2Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 10 of 28 tornadoes.

By time of day

60 12 AM: 1: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 1: 012 PM: 6: 0: 33 PM: 2: 2: 56 PM: 2: 1: 19 PM: 0: 1: 312 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 12:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

70 1950: 0: 0: 0: 0: 1: 0: 1: 0: 0: 01960: 0: 0: 0: 1: 0: 0: 0: 0: 0: 01970: 1: 0: 0: 0: 0: 1: 1: 1: 0: 01980: 1: 1: 0: 1: 0: 0: 0: 0: 0: 01990: 0: 0: 1: 0: 0: 0: 0: 0: 2: 02000: 0: 0: 0: 1: 0: 0: 0: 1: 0: 02010: 0: 0: 1: 0: 0: 0: 0: 1: 0: 02020: 1: 3: 0: 0: 7: 019501960197019801990200020102020

The line is the five-year average. Tornadoes before about 1953 were under-reported, and better radar since the 1990s finds more weak ones.

By rating

EF0
12
EF1
10
EF2
3
EF3
1
EF4
1
Unknown
1

Ratings before February 2007 use the original F scale; the numbers line up with today's EF scale. Unknown means NOAA could not assign a rating.

The record

Notable tornadoes

Deadliest

F3, August 3, 1963

2 deaths, 70 injuries Strongest

F4, June 3, 1980

11.8 mile path Longest path

45.3 miles, F2

June 4, 1975, whole path Widest

700 yards, F1

June 2, 1998
Every tornado

All 28 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Nov 20, 2024EF01 mi75 yd00
Jun 26, 2024EF111.54 mi300 yd00
Jun 26, 2024EF16.84 mi100 yd00
May 17, 2024EF11.88 mi125 yd00
May 17, 2024EF05.85 mi75 yd00
May 17, 2024EFU0.61 mi50 yd00
May 7, 2024EF10.2 mi150 yd00
Oct 21, 2021EF14.7 mi400 yd00
Oct 21, 2021EF00.54 mi100 yd00
Jun 21, 2021EF01.3 mi50 yd00
Apr 7, 2020EF13.83 mi250 yd00
Nov 18, 2017EF15.41 mi125 yd00
Sep 27, 2012EF00.3 mi75 yd00
Aug 9, 2007EF00.49 mi200 yd00
Jun 12, 2003F05.5 mi50 yd00
Jun 2, 1998F01 mi50 yd00
Jun 2, 1998F132 mi700 yd050
Jul 13, 1992F00.5 mi50 yd00
May 22, 1983F238 mi200 yd010
Jun 21, 1981F10.1 mi10 yd00
Jun 3, 1980F411.8 mi10 yd0140
Jul 7, 1977F00.1 mi10 yd00
Apr 25, 1976F00.1 mi10 yd00
Jun 4, 1975F245.3 mi30 yd00
Jul 31, 1970F10.5 mi200 yd00
Cities

Cities in Allegheny County

Each city page counts every tornado path within 10 miles of the city, including paths just over the county line.

Nearby

Nearby counties

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Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025, and SPC preliminary reports for 2026. Page built October 14, 2026.