Knox County, Ohio tornadoes

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13confirmed tornadoes since NOAA records began in 1950 (the first here in 1957). Most recent: June 5, 2024, EF0. 2026 so far: 1 preliminary report 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 Knox County

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The record

At a glance

Total131950 to 2025
Per year0.2average since 1950
Peak monthJune6 of 13
StrongestF2Jun 11, 1957
Deaths0whole paths, see note
Injuries17whole paths, see note

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

Seasons

When tornadoes hit here

By month

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

June is the peak month, with 6 of 13 tornadoes.

By time of day

20 12 AM: 0: 0: 03 AM: 0: 1: 06 AM: 0: 1: 09 AM: 0: 0: 112 PM: 1: 0: 13 PM: 1: 0: 26 PM: 2: 2: 09 PM: 1: 0: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 5:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

20 1950: 0: 0: 0: 0: 0: 0: 0: 1: 0: 01960: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01970: 2: 0: 0: 0: 0: 0: 0: 0: 0: 01980: 0: 2: 2: 0: 0: 0: 0: 0: 0: 01990: 1: 0: 0: 0: 0: 0: 0: 0: 1: 02000: 1: 0: 0: 0: 0: 0: 1: 0: 0: 02010: 0: 0: 0: 0: 0: 0: 0: 0: 0: 02020: 0: 0: 1: 0: 1: 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. This year so far: 1 preliminary reports.

By rating

EF0
6
EF1
2
EF2
5

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

Strongest

F2, June 11, 1957

0.5 mile path Longest path

10 miles, F1

September 20, 2000, whole path Widest

200 yards, F2

March 31, 1982
Every tornado

All 13 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 5, 2024EF03.26 mi80 yd00
Jun 13, 2022EF17.05 mi25 yd00
Aug 3, 2006F00.1 mi17 yd01
Sep 20, 2000F110 mi70 yd00
Jun 27, 1998F00.5 mi70 yd00
Jul 9, 1990F01 mi50 yd00
Apr 3, 1982F20.8 mi50 yd09
Mar 31, 1982F21 mi200 yd04
Jun 21, 1981F02 mi150 yd00
Jun 8, 1981F23.8 mi50 yd02
Sep 3, 1970F00.1 mi10 yd00
Apr 2, 1970F22 mi150 yd01
Jun 11, 1957F20.5 mi100 yd00
This year

2026 preliminary reports not yet confirmed

Report dateLocationRating
Mar 26, 20264 SW FredericktownNot yet rated

Preliminary reports from the Storm Prediction Center. One tornado can be reported more than once, and NOAA confirms the final record months later.

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.