Boone County, Iowa tornadoes

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58confirmed tornadoes since NOAA records began in 1950 (the first here in 1953). Most recent: July 19, 2025, EFU. 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 Boone County

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The record

At a glance

Total581950 to 2025
Per year0.8average since 1950
Peak monthJune18 of 58
StrongestF5Jun 13, 1976
Deaths1whole paths, see note
Injuries101whole paths, see note

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

Seasons

When tornadoes hit here

By month

180 Jan: 0Feb: 0Mar: 5Apr: 9May: 12Jun: 18Jul: 5Aug: 2Sep: 0Oct: 1Nov: 4Dec: 2JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 18 of 58 tornadoes.

By time of day

100 12 AM: 2: 0: 03 AM: 1: 1: 06 AM: 1: 0: 09 AM: 1: 0: 012 PM: 3: 5: 103 PM: 2: 9: 56 PM: 5: 5: 59 PM: 2: 1: 012 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

40 1950: 0: 0: 0: 1: 0: 1: 0: 0: 0: 11960: 0: 0: 1: 0: 2: 0: 1: 1: 0: 11970: 0: 0: 0: 0: 0: 0: 4: 1: 0: 01980: 1: 1: 1: 0: 0: 0: 0: 0: 0: 11990: 2: 1: 1: 3: 1: 1: 0: 0: 3: 02000: 2: 4: 1: 0: 2: 4: 0: 0: 0: 02010: 0: 0: 0: 0: 2: 2: 0: 2: 1: 02020: 2: 2: 2: 0: 1: 119501960197019801990200020102020

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
21
EF1
14
EF2
14
EF3
3
EF4
1
EF5
1
Unknown
4

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, November 12, 2005

1 deaths, 3 injuries Strongest

F5, June 13, 1976

21.3 mile path Longest path

41.1 miles, F4

May 10, 1959, whole path Widest

880 yards, F2

May 7, 1962
Every tornado

All 58 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jul 19, 2025EFU4.45 mi40 yd00
May 24, 2024EF010.7 mi180 yd00
Apr 23, 2022EFU3.93 mi60 yd00
Apr 23, 2022EF19.09 mi80 yd00
Dec 15, 2021EF216.25 mi125 yd00
Dec 15, 2021EF217.69 mi125 yd00
May 26, 2020EFU0.21 mi20 yd00
May 26, 2020EFU0.6 mi20 yd00
Jun 20, 2018EF02.78 mi100 yd00
Aug 21, 2017EF03.28 mi80 yd00
Mar 6, 2017EF017.86 mi85 yd00
Jun 7, 2015EF01.44 mi30 yd00
Jun 7, 2015EF02.83 mi40 yd00
Aug 31, 2014EF14.96 mi150 yd00
May 11, 2014EF01.68 mi100 yd00
Nov 12, 2005F212 mi100 yd01
Nov 12, 2005F16 mi75 yd00
Nov 12, 2005F317.6 mi150 yd13
Nov 12, 2005F214 mi100 yd02
Jun 11, 2004F00.1 mi25 yd00
Jun 11, 2004F00.5 mi40 yd00
Apr 17, 2002F00.3 mi35 yd00
May 10, 2001F11 mi50 yd00
Apr 11, 2001F14 mi40 yd00
Apr 11, 2001F13 mi140 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.