Osceola County, Iowa tornadoes

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31confirmed tornadoes since NOAA records began in 1950 (the first here in 1964). Most recent: August 20, 2021, 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 Osceola County

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The record

At a glance

Total311950 to 2025
Per year0.4average since 1950
Peak monthJune16 of 31
StrongestEF4Jun 25, 2010
Deaths0whole paths, see note
Injuries19whole paths, see note

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

Seasons

When tornadoes hit here

By month

160 Jan: 0Feb: 0Mar: 0Apr: 0May: 6Jun: 16Jul: 2Aug: 7Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 16 of 31 tornadoes.

By time of day

60 12 AM: 0: 0: 03 AM: 1: 2: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 1: 2: 33 PM: 4: 3: 36 PM: 2: 6: 39 PM: 1: 0: 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

40 1950: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01960: 0: 0: 0: 0: 1: 1: 1: 0: 1: 01970: 0: 2: 0: 0: 0: 0: 0: 0: 0: 11980: 0: 2: 1: 0: 0: 0: 0: 0: 0: 01990: 0: 1: 0: 2: 2: 0: 0: 0: 1: 02000: 1: 2: 0: 0: 0: 0: 0: 0: 2: 02010: 4: 1: 0: 0: 0: 0: 0: 2: 0: 02020: 0: 3: 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
15
EF1
2
EF2
9
EF3
3
EF4
1
Unknown
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

Strongest

EF4, June 25, 2010

13.65 mile path Longest path

46.5 miles, F3

May 31, 1971, whole path Widest

1,533 yards, F2

June 14, 1981
Every tornado

All 31 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Aug 20, 2021EF03.64 mi30 yd00
Aug 8, 2021EF02.42 mi50 yd00
Aug 8, 2021EFU0.79 mi40 yd00
Aug 18, 2017EF25.14 mi250 yd00
Aug 18, 2017EF11.63 mi100 yd00
May 11, 2011EF00.5 mi50 yd00
Jun 26, 2010EF00.15 mi50 yd00
Jun 26, 2010EF00.1 mi50 yd00
Jun 25, 2010EF00.17 mi50 yd00
Jun 25, 2010EF413.65 mi800 yd013
Jun 11, 2008EF00.85 mi50 yd00
May 1, 2008EF00.1 mi50 yd00
Jun 13, 2001F00.1 mi50 yd00
Jun 12, 2001F00.1 mi50 yd00
Jul 11, 2000F00.1 mi50 yd00
Jun 27, 1998F14 mi100 yd00
Aug 7, 1994F34.5 mi73 yd01
Jun 12, 1994F00.1 mi23 yd00
Jun 29, 1993F00.2 mi23 yd00
Jun 7, 1993F210 mi127 yd05
Jun 2, 1991F00.1 mi13 yd00
Jun 6, 1982F22 mi67 yd00
Jun 14, 1981F221.6 mi1,533 yd00
Jun 14, 1981F221.9 mi1,533 yd00
Aug 19, 1979F00.2 mi30 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.