Winnebago County, Wisconsin tornadoes

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33confirmed tornadoes since NOAA records began in 1950 (the first here in 1956). Most recent: June 20, 2020, 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.

Recent warnings

Recent warnings in Winnebago County

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The record

At a glance

Total331950 to 2025
Per year0.4average since 1950
Peak monthJune15 of 33
StrongestF4Apr 3, 1956
Deaths8whole paths, see note
Injuries111whole paths, see note

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

Seasons

When tornadoes hit here

By month

150 Jan: 0Feb: 0Mar: 0Apr: 4May: 8Jun: 15Jul: 2Aug: 4Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 15 of 33 tornadoes.

By time of day

60 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 112 PM: 1: 2: 23 PM: 6: 5: 46 PM: 6: 3: 19 PM: 1: 0: 112 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 3:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

70 1950: 0: 0: 0: 0: 0: 0: 1: 0: 0: 11960: 0: 0: 0: 0: 1: 0: 0: 0: 0: 01970: 0: 2: 0: 0: 1: 0: 0: 0: 0: 11980: 0: 0: 0: 0: 1: 0: 0: 1: 0: 11990: 0: 0: 0: 1: 0: 0: 0: 0: 1: 02000: 0: 0: 2: 2: 0: 7: 0: 0: 1: 02010: 2: 1: 0: 0: 2: 0: 0: 1: 0: 02020: 3: 0: 0: 0: 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.

By rating

EF0
19
EF1
10
EF2
1
EF4
3

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 3, 1956

7 deaths, 50 injuries Strongest

F4, April 3, 1956

11.5 mile path Longest path

30.6 miles, F2

May 8, 1964, whole path Widest

440 yards, F4

April 3, 1956
Every tornado

All 33 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 20, 2020EF03.37 mi75 yd00
Jun 20, 2020EF01.07 mi75 yd00
Jun 20, 2020EF00.24 mi50 yd00
Jun 14, 2017EF18.02 mi125 yd00
Aug 18, 2014EF02.06 mi50 yd00
Jul 27, 2014EF00.01 mi10 yd00
Apr 10, 2011EF114.93 mi150 yd00
May 4, 2010EF03.4 mi100 yd00
May 4, 2010EF10.7 mi100 yd00
Jul 19, 2008EF10.49 mi40 yd00
Aug 18, 2005F04 mi50 yd00
Jun 10, 2005F00.1 mi20 yd00
Jun 10, 2005F00.1 mi20 yd00
Jun 10, 2005F00.1 mi20 yd00
Jun 10, 2005F00.1 mi20 yd00
Jun 9, 2005F03 mi40 yd00
May 6, 2005F02.5 mi50 yd00
Jun 8, 2003F00.5 mi40 yd00
Jun 8, 2003F00.1 mi15 yd00
May 6, 2002F00.1 mi20 yd00
May 6, 2002F04 mi50 yd00
Aug 23, 1998F00.1 mi30 yd00
Jun 8, 1993F00.1 mi23 yd00
May 24, 1989F11.2 mi50 yd00
Aug 14, 1987F10.2 mi100 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 13, 2026.