Big Horn County, Wyoming tornadoes

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32confirmed tornadoes since NOAA records began in 1950 (the first here in 1958). Most recent: June 12, 2017, 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 Big Horn County

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The record

At a glance

Total321950 to 2025
Per year0.4average since 1950
Peak monthJune20 of 32
StrongestF3Aug 2, 1985
Deaths1whole paths, see note
Injuries2whole paths, see note

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

Seasons

When tornadoes hit here

By month

200 Jan: 0Feb: 0Mar: 0Apr: 0May: 2Jun: 20Jul: 8Aug: 2Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 20 of 32 tornadoes.

By time of day

70 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 0: 5: 23 PM: 6: 6: 26 PM: 7: 2: 19 PM: 1: 0: 012 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

60 1950: 0: 0: 0: 0: 0: 0: 0: 0: 1: 11960: 0: 0: 2: 0: 1: 0: 0: 1: 0: 01970: 0: 0: 0: 0: 3: 0: 1: 0: 2: 01980: 0: 1: 0: 0: 1: 1: 0: 1: 0: 01990: 0: 0: 1: 0: 0: 0: 0: 6: 0: 02000: 0: 2: 0: 0: 0: 3: 0: 0: 0: 12010: 1: 0: 0: 0: 1: 0: 0: 1: 0: 02020: 0: 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
15
EF1
10
EF2
6
EF3
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

Deadliest

F2, June 26, 1959

1 deaths, 1 injuries Strongest

F3, August 2, 1985

0.2 mile path Longest path

10 miles, F0

June 1, 2005, whole path Widest

400 yards, F1

June 26, 2001
Every tornado

All 32 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 12, 2017EF03.14 mi30 yd00
May 24, 2014EF00.77 mi20 yd00
Aug 12, 2010EF02.44 mi30 yd00
Jun 1, 2009EF10.36 mi35 yd00
Jun 1, 2005F010 mi20 yd00
Jun 1, 2005F04 mi30 yd00
Jun 1, 2005F04 mi30 yd00
Jun 26, 2001F10.7 mi400 yd00
Jun 26, 2001F00.5 mi50 yd00
Jul 24, 1997F00.1 mi50 yd00
Jun 13, 1997F00.1 mi30 yd00
Jun 13, 1997F00.1 mi30 yd00
Jun 6, 1997F11 mi50 yd00
Jun 6, 1997F00.2 mi30 yd00
Jun 6, 1997F00.5 mi50 yd00
Jul 12, 1992F00.1 mi10 yd00
Jun 18, 1987F02 mi13 yd00
Aug 2, 1985F30.2 mi10 yd00
May 3, 1984F00.5 mi10 yd00
Jul 24, 1981F10.1 mi10 yd00
Jul 4, 1978F25 mi200 yd01
Jun 18, 1978F10.1 mi10 yd00
Jul 4, 1976F10.2 mi10 yd00
Jul 20, 1974F10.1 mi10 yd00
Jun 20, 1974F10.1 mi10 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.