Waukesha County, Wisconsin tornadoes

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39confirmed tornadoes since NOAA records began in 1950 (the first here in 1954). Most recent: July 28, 2023, EF1. 2026 so far: 3 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 Waukesha County

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The record

At a glance

Total391950 to 2025
Per year0.5average since 1950
Peak monthJuly12 of 39
StrongestF4Apr 27, 1984
Deaths1whole paths, see note
Injuries43whole paths, see note

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

Seasons

When tornadoes hit here

By month

120 Jan: 0Feb: 0Mar: 1Apr: 3May: 4Jun: 11Jul: 12Aug: 5Sep: 0Oct: 3Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

July is the peak month, with 12 of 39 tornadoes.

By time of day

60 12 AM: 4: 0: 03 AM: 1: 0: 06 AM: 0: 0: 19 AM: 0: 1: 012 PM: 1: 3: 23 PM: 1: 5: 16 PM: 3: 5: 69 PM: 1: 0: 412 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 8:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

40 1950: 0: 0: 0: 0: 1: 0: 1: 0: 0: 21960: 0: 0: 0: 0: 0: 2: 1: 1: 0: 11970: 0: 0: 2: 1: 0: 0: 0: 2: 0: 01980: 2: 1: 1: 0: 1: 1: 0: 2: 1: 01990: 0: 0: 0: 0: 0: 0: 0: 0: 0: 12000: 0: 0: 0: 0: 0: 0: 0: 0: 1: 12010: 3: 0: 0: 0: 0: 2: 0: 0: 0: 12020: 0: 4: 1: 2: 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. This year so far: 3 preliminary reports.

By rating

EF0
8
EF1
21
EF2
7
EF3
2
EF4
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

F4, April 27, 1984

1 deaths, 14 injuries Strongest

F4, April 27, 1984

6.5 mile path Longest path

69.5 miles, F3

June 5, 1977, whole path Widest

880 yards, EF2

June 21, 2010
Every tornado

All 39 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jul 28, 2023EF11.27 mi90 yd00
Mar 31, 2023EF12.79 mi50 yd00
Oct 12, 2022EF00.61 mi50 yd00
Jul 29, 2021EF10.88 mi95 yd00
Jul 29, 2021EF02.44 mi50 yd00
Jul 29, 2021EF11.03 mi75 yd00
Jul 29, 2021EF14.67 mi150 yd00
Oct 1, 2019EF112.83 mi100 yd00
Aug 18, 2015EF00.64 mi25 yd00
Aug 18, 2015EF12.47 mi50 yd00
Jul 22, 2010EF21 mi100 yd00
Jun 21, 2010EF15.89 mi200 yd00
Jun 21, 2010EF25.22 mi880 yd015
Jun 8, 2009EF03.15 mi100 yd00
Jun 7, 2008EF00.12 mi20 yd00
Jun 6, 1999F10.2 mi40 yd00
May 8, 1988F00.1 mi20 yd00
Aug 16, 1987F11.5 mi100 yd01
Jul 6, 1987F10.3 mi100 yd00
Aug 17, 1985F115 mi50 yd00
Apr 27, 1984F46.5 mi10 yd114
May 15, 1982F12 mi30 yd00
Jun 15, 1981F228.7 mi50 yd03
Jul 29, 1980F10.1 mi10 yd00
Jun 5, 1980F310.7 mi100 yd00
This year

2026 preliminary reports not yet confirmed

Report dateLocationRating
Apr 17, 20262 N Wind LakeNot yet rated
Apr 14, 20262 NW SussexNot yet rated
Apr 14, 20262 WNW SussexNot 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.

Cities

Cities in Waukesha County

Each city page counts every tornado path within 10 miles of the city, including paths just over the county line.

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.