Marshall County, Iowa tornadoes

Checking live National Weather Service warnings for Marshall County...

39confirmed tornadoes since NOAA records began in 1950 (the first here in 1951). Most recent: August 10, 2020, EF1. 2026 so far: 0 preliminary reports preliminary

Join the free alerts waiting list
Map

Every tornado path in the county

Tornado paths, 1950 to 2025
Use two fingers to move the map
(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 Marshall County

Loading warnings...

The record

At a glance

Total391950 to 2025
Per year0.5average since 1950
Peak monthJune12 of 39
StrongestF4May 24, 1989
Deaths7whole paths, see note
Injuries100whole paths, see note

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

Seasons

When tornadoes hit here

By month

120 Jan: 0Feb: 0Mar: 1Apr: 4May: 7Jun: 12Jul: 5Aug: 5Sep: 4Oct: 0Nov: 1Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

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

By time of day

70 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 4: 112 PM: 4: 0: 23 PM: 4: 3: 46 PM: 1: 7: 49 PM: 2: 3: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 7:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

60 1950: 0: 1: 0: 0: 0: 0: 0: 0: 0: 01960: 0: 1: 1: 0: 0: 0: 1: 0: 0: 41970: 0: 0: 0: 0: 1: 0: 0: 0: 1: 01980: 0: 1: 0: 0: 0: 0: 0: 1: 0: 21990: 0: 1: 0: 1: 1: 0: 1: 0: 2: 02000: 1: 1: 0: 0: 6: 0: 0: 0: 2: 02010: 0: 0: 0: 0: 2: 1: 0: 0: 2: 02020: 4: 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
13
EF1
15
EF2
4
EF3
4
EF4
1
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.

The record

Notable tornadoes

Deadliest

F3, September 16, 1978

6 deaths, 45 injuries Strongest

F4, May 24, 1989

66 mile path Longest path

87.7 miles, F3

April 23, 1961, whole path Widest

1,200 yards, EF3

July 19, 2018
Every tornado

All 39 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Aug 10, 2020EF12.88 mi100 yd00
Aug 10, 2020EFU0.42 mi50 yd00
Aug 10, 2020EFU1.03 mi50 yd00
Mar 28, 2020EF01.3 mi75 yd00
Jul 19, 2018EF38.41 mi1,200 yd022
Jul 19, 2018EF00.85 mi40 yd00
Nov 11, 2015EF01.86 mi100 yd00
Jun 30, 2014EF06.51 mi150 yd00
Jun 30, 2014EF112.04 mi460 yd00
Jul 19, 2008EF00.67 mi25 yd00
Jun 8, 2008EF11.03 mi75 yd00
Sep 5, 2004F13.5 mi30 yd00
Sep 5, 2004F03 mi25 yd00
Aug 26, 2004F13 mi30 yd00
Aug 3, 2004F15 mi100 yd00
May 22, 2004F117 mi100 yd00
May 22, 2004F00.5 mi40 yd00
Apr 11, 2001F117.5 mi45 yd00
Jun 13, 2000F114 mi40 yd00
Jun 29, 1998F11 mi50 yd00
May 30, 1998F122 mi50 yd00
May 19, 1996F00.1 mi25 yd00
Apr 14, 1994F11.5 mi30 yd00
Jul 18, 1993F00.1 mi20 yd00
Sep 12, 1991F10.6 mi20 yd00
Nearby

Nearby counties

Coming soon

Free tornado alerts for Marshall County

We are building free email alerts for tornado warnings. Join the waiting list and we will email you once when they are ready. Until then, please rely on the National Weather Service and your phone's emergency alerts.

Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025, and SPC preliminary reports for 2026. Page built October 13, 2026.