Rock County, Wisconsin tornadoes

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36confirmed tornadoes since NOAA records began in 1950 (the first here in 1955). Most recent: July 15, 2024, EF0. 2026 so far: 2 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 Rock County

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The record

At a glance

Total361950 to 2025
Per year0.5average since 1950
Peak monthMay9 of 36
StrongestF3Jan 24, 1967
Deaths1whole paths, see note
Injuries49whole paths, see note

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

Seasons

When tornadoes hit here

By month

90 Jan: 1Feb: 1Mar: 3Apr: 2May: 9Jun: 6Jul: 5Aug: 3Sep: 3Oct: 1Nov: 2Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 9 of 36 tornadoes.

By time of day

80 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 1: 012 PM: 1: 5: 33 PM: 2: 4: 76 PM: 8: 3: 19 PM: 0: 1: 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

50 1950: 0: 0: 0: 0: 0: 1: 0: 0: 0: 01960: 1: 1: 0: 0: 0: 2: 0: 2: 0: 11970: 1: 1: 1: 0: 0: 1: 0: 0: 1: 01980: 0: 0: 0: 1: 0: 0: 0: 0: 1: 01990: 0: 2: 0: 0: 0: 0: 0: 0: 1: 02000: 1: 0: 0: 1: 0: 1: 1: 0: 0: 12010: 1: 0: 0: 0: 0: 1: 0: 1: 0: 02020: 0: 1: 1: 3: 5: 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: 2 preliminary reports.

By rating

EF0
13
EF1
13
EF2
9
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, March 27, 1991

1 deaths, 5 injuries Strongest

F3, January 24, 1967

24.9 mile path Longest path

32 miles, F2

March 27, 1991, whole path Widest

750 yards, EF2

February 8, 2024
Every tornado

All 36 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jul 15, 2024EF01.22 mi50 yd00
Jun 22, 2024EF26.03 mi700 yd00
May 26, 2024EF014.36 mi50 yd00
May 26, 2024EF011.83 mi50 yd00
Feb 8, 2024EF225.9 mi750 yd01
Jul 13, 2023EF00.39 mi25 yd00
Mar 31, 2023EF03.56 mi100 yd00
Mar 31, 2023EF05.75 mi75 yd00
May 25, 2022EF03.48 mi50 yd00
Aug 9, 2021EF03.24 mi25 yd00
Jun 28, 2017EF00.79 mi100 yd00
Jul 18, 2015EF14.94 mi50 yd00
Sep 21, 2010EF00.42 mi30 yd00
Jun 23, 2009EF00.84 mi30 yd00
Aug 26, 2006F00.1 mi20 yd00
Jul 25, 2005F12 mi50 yd00
May 30, 2003F110.1 mi100 yd00
Aug 5, 2000F00.1 mi20 yd00
Jun 25, 1998F22.5 mi100 yd00
May 22, 1991F14 mi73 yd00
Mar 27, 1991F232 mi440 yd15
May 8, 1988F227 mi173 yd00
Jul 3, 1983F10.3 mi10 yd00
Apr 5, 1978F10.7 mi10 yd00
Jun 4, 1975F10.2 mi17 yd00
This year

2026 preliminary reports not yet confirmed

Report dateLocationRating
Apr 17, 20265 ENE AvalonNot yet rated
Apr 17, 20264 SE JanesvilleNot 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.