Johnson County, Illinois tornadoes

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20confirmed tornadoes since NOAA records began in 1950 (the first here in 1957). Most recent: April 2, 2025, EF2. 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

Total201950 to 2025
Per year0.3average since 1950
Peak monthMay6 of 20
StrongestF3Apr 28, 2002
Deaths1whole paths, see note
Injuries26whole paths, see note

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

Seasons

When tornadoes hit here

By month

60 Jan: 0Feb: 0Mar: 2Apr: 5May: 6Jun: 3Jul: 0Aug: 0Sep: 0Oct: 3Nov: 0Dec: 1JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 6 of 20 tornadoes.

By time of day

50 12 AM: 3: 0: 03 AM: 1: 0: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 0: 0: 13 PM: 0: 3: 36 PM: 5: 1: 19 PM: 2: 0: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 6:00 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: 0: 0: 1: 0: 1: 1: 0: 0: 0: 01980: 0: 0: 0: 0: 0: 0: 1: 0: 0: 01990: 0: 0: 0: 0: 0: 0: 0: 0: 2: 02000: 0: 0: 2: 2: 2: 0: 0: 0: 0: 02010: 0: 1: 0: 1: 0: 1: 0: 0: 0: 02020: 0: 0: 0: 0: 2: 219501960197019801990200020102020

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
9
EF3
2

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, April 28, 2002

1 deaths, 10 injuries Strongest

F3, April 28, 2002

19.3 mile path Longest path

30.9 miles, F2

April 14, 1972, whole path Widest

400 yards, F3

April 28, 2002
Every tornado

All 20 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Apr 2, 2025EF26.2 mi250 yd00
Mar 15, 2025EF215.63 mi150 yd00
May 26, 2024EF16.94 mi100 yd00
May 26, 2024EF34.87 mi300 yd01
Jun 19, 2015EF10.4 mi50 yd00
Oct 31, 2013EF10.7 mi50 yd00
May 25, 2011EF219.87 mi325 yd00
Oct 18, 2004F214 mi300 yd00
Oct 18, 2004F28.8 mi250 yd03
May 6, 2003F00.2 mi30 yd00
May 6, 2003F00.2 mi30 yd00
Apr 28, 2002F27 mi400 yd02
Apr 28, 2002F319.3 mi400 yd110
Jun 14, 1998F00.3 mi30 yd00
Apr 13, 1998F11 mi40 yd01
May 15, 1986F16 mi10 yd00
Mar 28, 1975F00.1 mi10 yd00
Jun 22, 1974F20.1 mi10 yd00
Apr 14, 1972F230.9 mi30 yd09
Dec 18, 1957F20.1 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.