Bon Homme County, South Dakota tornadoes

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26confirmed tornadoes since NOAA records began in 1950 (the first here in 1954). Most recent: July 3, 2023, 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 Bon Homme County

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The record

At a glance

Total261950 to 2025
Per year0.3average since 1950
Peak monthMay9 of 26
StrongestF3Jun 18, 1954
Deaths0whole paths, see note
Injuries4whole paths, see note

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

Seasons

When tornadoes hit here

By month

90 Jan: 0Feb: 0Mar: 1Apr: 4May: 9Jun: 8Jul: 3Aug: 0Sep: 1Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 9 of 26 tornadoes.

By time of day

50 12 AM: 0: 1: 03 AM: 1: 0: 06 AM: 0: 0: 09 AM: 0: 0: 112 PM: 1: 3: 13 PM: 5: 0: 26 PM: 3: 2: 19 PM: 2: 1: 212 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 3:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

30 1950: 0: 0: 0: 0: 1: 0: 1: 0: 0: 01960: 0: 1: 1: 0: 0: 2: 0: 0: 0: 01970: 1: 0: 1: 0: 0: 2: 0: 0: 2: 01980: 0: 1: 0: 0: 1: 3: 0: 0: 0: 01990: 0: 0: 0: 0: 0: 0: 0: 0: 0: 12000: 0: 0: 0: 0: 0: 0: 0: 2: 1: 12010: 0: 0: 1: 0: 0: 0: 0: 0: 0: 12020: 0: 0: 1: 1: 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
11
EF1
6
EF2
4
EF3
4
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

F3, June 18, 1954

10.6 mile path Longest path

35.6 miles, F3

June 26, 1965, whole path Widest

1,760 yards, F3

June 5, 1962
Every tornado

All 26 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jul 3, 2023EF01.16 mi40 yd00
May 30, 2022EFU5.46 mi50 yd00
Sep 10, 2019EF01.43 mi20 yd00
Apr 15, 2012EF00.51 mi25 yd00
Mar 23, 2009EF10.86 mi100 yd00
May 29, 2008EF00.1 mi50 yd00
May 5, 2007EF24 mi100 yd00
May 5, 2007EF23.5 mi100 yd00
May 3, 1999F00.1 mi50 yd00
Apr 20, 1985F00.1 mi10 yd00
Apr 20, 1985F10.1 mi10 yd00
Apr 20, 1985F23.5 mi1,000 yd00
Jun 22, 1984F00.1 mi10 yd00
Jul 19, 1981F17.5 mi10 yd02
Jul 4, 1978F00.1 mi10 yd00
Jun 25, 1978F00.1 mi10 yd00
May 6, 1975F00.1 mi10 yd00
May 6, 1975F10.1 mi10 yd00
Jun 13, 1972F00.1 mi10 yd00
Jun 15, 1970F10.1 mi10 yd00
Jun 26, 1965F335.6 mi163 yd00
Jun 21, 1965F315.4 mi87 yd00
Jun 5, 1962F39.5 mi1,760 yd00
May 14, 1961F10.3 mi60 yd00
May 10, 1956F25.6 mi100 yd02
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.