Marion County, Iowa tornadoes

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47 confirmed tornadoes since NOAA records began in 1950 (the first here in 1962). Most recent: May 7, 2024, EF0. 2026 so far: 0 preliminary reports preliminary

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Every tornado path in the county

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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.

At a glance

Total471950 to 2025
Per year0.6average since 1950
Peak monthMay19 of 47
StrongestF3Apr 8, 1999
Deaths0whole paths, see note
Injuries35whole paths, see note

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

When tornadoes hit here

By month

190 Jan: 0Feb: 0Mar: 3Apr: 4May: 19Jun: 12Jul: 4Aug: 2Sep: 1Oct: 1Nov: 1Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 19 of 47 tornadoes.

By time of day

90 12 AM: 1: 0: 03 AM: 1: 1: 16 AM: 0: 0: 09 AM: 0: 1: 212 PM: 1: 0: 93 PM: 4: 5: 86 PM: 1: 9: 19 PM: 1: 0: 112 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 2:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

70 1950: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01960: 0: 0: 1: 0: 1: 0: 0: 0: 0: 11970: 0: 1: 1: 0: 0: 0: 1: 0: 0: 01980: 0: 1: 1: 0: 1: 1: 2: 1: 1: 01990: 0: 0: 0: 0: 0: 0: 0: 0: 1: 12000: 1: 0: 1: 1: 0: 3: 0: 2: 3: 02010: 0: 0: 0: 0: 0: 2: 0: 4: 4: 12020: 0: 1: 0: 7: 1: 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
17
EF1
20
EF2
5
EF3
3
Unknown
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.

Notable tornadoes

Strongest

F3, April 8, 1999

39 mile path Longest path

39 miles, F3

April 8, 1999, whole path Widest

1,250 yards, EF2

September 30, 2007

All 47 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
May 7, 2024EF04.96 mi80 yd00
May 13, 2023EF00.92 mi50 yd00
May 13, 2023EFU0.31 mi30 yd00
May 13, 2023EF00.66 mi40 yd00
May 13, 2023EF00.54 mi50 yd00
May 13, 2023EFU0.52 mi30 yd00
May 13, 2023EF01.07 mi40 yd00
Apr 4, 2023EF115.32 mi130 yd00
Jun 20, 2021EF11.47 mi150 yd00
Aug 20, 2019EF11.58 mi120 yd00
Jul 19, 2018EF39.17 mi800 yd013
Jul 19, 2018EF00.99 mi40 yd00
Jul 19, 2018EF13.96 mi500 yd00
May 3, 2018EF01.07 mi25 yd00
Jun 28, 2017EF117.8 mi500 yd00
Mar 6, 2017EF05.45 mi65 yd00
Mar 6, 2017EF16.76 mi80 yd00
Mar 6, 2017EF15.33 mi120 yd00
Nov 11, 2015EF14.38 mi100 yd01
Jun 22, 2015EF311.12 mi575 yd00
Jun 5, 2008EF118.26 mi150 yd00
May 30, 2008EF219.18 mi900 yd010
May 30, 2008EF17.2 mi125 yd00
Sep 30, 2007EF221.86 mi1,250 yd00
Jun 7, 2007EF00.2 mi30 yd00

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.