Union County, Ohio tornadoes

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12confirmed tornadoes since NOAA records began in 1950 (the first here in 1963). Most recent: December 29, 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.

The record

At a glance

Total121950 to 2025
Per year0.2average since 1950
Peak monthJune4 of 12
StrongestF3Nov 10, 2002
Deaths4whole paths, see note
Injuries68whole 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

40 Jan: 0Feb: 0Mar: 2Apr: 1May: 0Jun: 4Jul: 1Aug: 0Sep: 1Oct: 0Nov: 2Dec: 1JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 4 of 12 tornadoes.

By time of day

30 12 AM: 0: 1: 03 AM: 1: 0: 06 AM: 0: 0: 09 AM: 0: 0: 112 PM: 1: 0: 33 PM: 2: 0: 06 PM: 1: 0: 09 PM: 0: 1: 112 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 2:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

20 1950: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01960: 0: 0: 0: 1: 1: 1: 1: 0: 0: 01970: 0: 0: 0: 2: 0: 0: 0: 0: 0: 01980: 0: 1: 0: 0: 0: 0: 0: 0: 0: 01990: 0: 0: 0: 0: 0: 0: 0: 0: 0: 02000: 0: 0: 2: 0: 0: 0: 0: 0: 0: 02010: 1: 0: 0: 0: 0: 0: 0: 0: 0: 02020: 0: 0: 0: 0: 2: 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
4
EF1
5
EF2
2
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

F2, April 11, 1965

4 deaths, 62 injuries Strongest

F3, November 10, 2002

9 mile path Longest path

22.2 miles, F2

April 11, 1965, whole path Widest

600 yards, EF2

March 14, 2024
Every tornado

All 12 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Dec 29, 2024EF00.35 mi50 yd00
Mar 14, 2024EF219.48 mi600 yd00
Jun 6, 2010EF03.39 mi100 yd00
Nov 10, 2002F10.5 mi200 yd00
Nov 10, 2002F39 mi300 yd02
Jun 21, 1981F11.9 mi100 yd03
Jun 28, 1973F00.3 mi167 yd00
Jun 19, 1973F00.3 mi100 yd01
Jul 10, 1966F12 mi150 yd00
Apr 11, 1965F222.2 mi400 yd462
Mar 8, 1964F10.1 mi10 yd00
Sep 12, 1963F10.1 mi10 yd00
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 12, 2026.