Monona County, Iowa tornadoes

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30confirmed tornadoes since NOAA records began in 1950 (the first here in 1953). Most recent: April 26, 2024, EF1. 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 Monona County

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The record

At a glance

Total301950 to 2025
Per year0.4average since 1950
Peak monthJune10 of 30
StrongestF4Jul 28, 1986
Deaths4whole paths, see note
Injuries66whole paths, see note

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

Seasons

When tornadoes hit here

By month

100 Jan: 0Feb: 0Mar: 1Apr: 5May: 5Jun: 10Jul: 3Aug: 3Sep: 2Oct: 1Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 10 of 30 tornadoes.

By time of day

60 12 AM: 1: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 1: 3: 13 PM: 1: 4: 66 PM: 6: 4: 19 PM: 1: 1: 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

40 1950: 0: 0: 0: 1: 0: 0: 0: 0: 0: 01960: 0: 0: 1: 0: 0: 2: 0: 1: 2: 01970: 0: 0: 0: 0: 0: 0: 0: 1: 0: 01980: 0: 0: 0: 0: 0: 0: 1: 1: 0: 01990: 0: 1: 1: 0: 0: 0: 0: 0: 4: 12000: 0: 3: 0: 0: 0: 0: 0: 0: 3: 02010: 0: 2: 1: 1: 0: 0: 0: 0: 0: 02020: 0: 0: 0: 0: 3: 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
14
EF1
8
EF2
5
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

EF3, June 11, 2008

4 deaths, 48 injuries Strongest

F4, July 28, 1986

52.5 mile path Longest path

52.5 miles, F4

July 28, 1986, whole path Widest

1,200 yards, EF3

April 9, 2011
Every tornado

All 30 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Apr 26, 2024EF13.29 mi250 yd00
Apr 26, 2024EF01.47 mi100 yd00
Apr 26, 2024EF19.12 mi766 yd00
Oct 4, 2013EF226.56 mi264 yd02
Apr 14, 2012EF00.4 mi25 yd00
Jun 20, 2011EF17.13 mi300 yd00
Apr 9, 2011EF33.38 mi1,200 yd014
Jun 11, 2008EF00.26 mi60 yd00
Jun 11, 2008EF312.96 mi440 yd448
May 29, 2008EF13.8 mi200 yd00
Aug 17, 2001F00.2 mi30 yd00
Aug 17, 2001F04 mi20 yd00
Jun 13, 2001F00.1 mi30 yd00
May 16, 1999F222.5 mi90 yd00
Jul 6, 1998F00.1 mi50 yd00
Jun 23, 1998F02 mi50 yd00
Jun 23, 1998F22 mi50 yd00
May 21, 1998F00.2 mi50 yd00
Jun 16, 1992F00.1 mi20 yd00
May 28, 1991F25 mi60 yd00
Jul 5, 1987F00.2 mi13 yd00
Jul 28, 1986F452.5 mi73 yd02
Aug 15, 1977F00.2 mi20 yd00
Jun 24, 1968F00.1 mi10 yd00
Jun 24, 1968F00.1 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 13, 2026.