Dallas County, Iowa tornadoes

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60confirmed tornadoes since NOAA records began in 1950 (the first here in 1955). Most recent: May 24, 2024, 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 Dallas County

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The record

At a glance

Total601950 to 2025
Per year0.8average since 1950
Peak monthMay31 of 60
StrongestF4May 10, 1959
Deaths0whole paths, see note
Injuries91whole paths, see note

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

Seasons

When tornadoes hit here

By month

310 Jan: 0Feb: 0Mar: 2Apr: 6May: 31Jun: 13Jul: 3Aug: 1Sep: 2Oct: 0Nov: 2Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 31 of 60 tornadoes.

By time of day

130 12 AM: 0: 1: 13 AM: 1: 0: 06 AM: 0: 0: 09 AM: 0: 1: 012 PM: 5: 3: 33 PM: 4: 4: 56 PM: 13: 9: 59 PM: 2: 1: 212 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 6:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

80 1950: 0: 0: 0: 0: 0: 1: 0: 0: 0: 11960: 1: 0: 0: 0: 1: 0: 2: 0: 0: 01970: 0: 0: 0: 0: 0: 1: 3: 0: 0: 21980: 0: 0: 1: 1: 0: 1: 8: 1: 0: 01990: 1: 0: 0: 1: 0: 1: 0: 1: 2: 22000: 4: 1: 0: 0: 4: 1: 1: 0: 2: 12010: 0: 0: 0: 2: 1: 2: 0: 0: 1: 22020: 2: 1: 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
36
EF1
11
EF2
6
EF3
1
EF4
3
Unknown
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

Strongest

F4, May 10, 1959

41.1 mile path Longest path

57 miles, F4

May 27, 1995, whole path Widest

1,250 yards, F4

April 8, 1999
Every tornado

All 60 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
May 24, 2024EF09.17 mi80 yd00
Apr 26, 2024EF03.65 mi50 yd00
Apr 16, 2024EF06.96 mi60 yd00
May 20, 2021EF01.93 mi50 yd00
May 26, 2020EFU1.69 mi30 yd00
May 26, 2020EF00.95 mi40 yd00
Sep 9, 2019EFU2.86 mi10 yd00
Sep 9, 2019EFU1.37 mi10 yd00
Jun 20, 2018EF02.78 mi100 yd00
Nov 11, 2015EF111.28 mi100 yd00
May 17, 2015EF00.32 mi40 yd00
May 11, 2014EF05.91 mi100 yd00
May 19, 2013EF11.43 mi100 yd00
May 19, 2013EF02.08 mi100 yd00
Jun 7, 2009EF01.86 mi125 yd00
May 29, 2008EF13.68 mi150 yd00
May 29, 2008EF00.1 mi25 yd00
Mar 30, 2006F00.1 mi25 yd00
Nov 12, 2005F214 mi100 yd02
May 22, 2004F00.2 mi25 yd00
May 22, 2004F00.5 mi50 yd00
May 22, 2004F15 mi100 yd00
May 22, 2004F00.2 mi25 yd00
Apr 8, 2001F00.2 mi20 yd00
Jun 12, 2000F00.1 mi20 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.