Union County, Pennsylvania tornadoes

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12confirmed tornadoes since NOAA records began in 1950 (the first here in 1985). Most recent: July 2, 2023, EF1. 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 Union County

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The record

At a glance

Total121950 to 2025
Per year0.2average since 1950
Peak monthJuly6 of 12
StrongestF3May 31, 1985
Deaths6whole paths, see note
Injuries60whole paths, see note

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

Seasons

When tornadoes hit here

By month

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

July is the peak month, with 6 of 12 tornadoes.

By time of day

30 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 112 PM: 0: 2: 23 PM: 3: 2: 06 PM: 0: 1: 09 PM: 0: 1: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 3:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

30 1950: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01960: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01970: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01980: 0: 0: 0: 0: 0: 1: 0: 0: 0: 01990: 0: 0: 0: 0: 0: 0: 0: 2: 1: 02000: 0: 1: 0: 0: 0: 0: 0: 0: 0: 12010: 0: 1: 0: 0: 0: 1: 0: 0: 0: 12020: 0: 0: 0: 3: 0: 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
3
EF1
8
EF3
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, May 31, 1985

6 deaths, 60 injuries Strongest

F3, May 31, 1985

19 mile path Longest path

19 miles, F3

May 31, 1985, whole path Widest

910 yards, F3

May 31, 1985
Every tornado

All 12 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jul 2, 2023EF12.37 mi150 yd00
Jul 2, 2023EF12.12 mi50 yd00
Jul 2, 2023EF11.47 mi150 yd00
Apr 14, 2019EF11.45 mi150 yd00
Aug 20, 2015EF10.19 mi100 yd00
May 23, 2011EF11.24 mi100 yd00
Jul 11, 2009EF01 mi50 yd00
Sep 4, 2001F12.5 mi300 yd00
Sep 27, 1998F12.5 mi400 yd00
Jul 18, 1997F02.3 mi100 yd00
Jul 18, 1997F01 mi440 yd00
May 31, 1985F319 mi910 yd660
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 13, 2026.