Corson County, South Dakota tornadoes

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23confirmed tornadoes since NOAA records began in 1950 (the first here in 1953). Most recent: September 14, 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 Corson County

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The record

At a glance

Total231950 to 2025
Per year0.3average since 1950
Peak monthJune9 of 23
StrongestF2May 29, 1953
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 Corson County.

Seasons

When tornadoes hit here

By month

90 Jan: 0Feb: 0Mar: 0Apr: 2May: 3Jun: 9Jul: 3Aug: 5Sep: 1Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 9 of 23 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: 1: 23 PM: 3: 0: 16 PM: 7: 4: 19 PM: 0: 1: 312 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

20 1950: 0: 0: 0: 1: 0: 2: 0: 0: 0: 01960: 0: 0: 0: 0: 0: 1: 1: 0: 0: 01970: 0: 2: 0: 0: 0: 0: 0: 2: 0: 21980: 0: 0: 0: 1: 2: 0: 0: 0: 0: 01990: 1: 0: 0: 0: 0: 1: 0: 0: 0: 12000: 0: 0: 0: 0: 0: 0: 0: 2: 0: 02010: 0: 2: 0: 0: 0: 0: 0: 0: 0: 02020: 0: 1: 0: 0: 0: 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
EF2
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

F2, May 29, 1953

0.5 mile path Longest path

7.2 miles, F0

April 19, 1955, whole path Widest

50 yards, F0

April 19, 1955
Every tornado

All 23 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Sep 14, 2025EFU0.01 mi1 yd00
Jun 8, 2021EF00.17 mi10 yd00
Aug 14, 2011EF00.21 mi10 yd00
Aug 14, 2011EF00.2 mi10 yd00
Aug 10, 2007EF00.2 mi10 yd00
Aug 10, 2007EF00.3 mi20 yd00
Jun 8, 1999F02 mi20 yd00
Aug 17, 1995F00.1 mi10 yd00
Jun 11, 1990F00.3 mi20 yd00
Jun 27, 1984F00.1 mi10 yd00
Jun 27, 1984F00.1 mi10 yd00
Jun 21, 1983F00.1 mi10 yd00
Jul 11, 1979F00.1 mi10 yd00
Jul 11, 1979F00.1 mi10 yd00
Jun 10, 1977F00.5 mi10 yd00
May 18, 1977F00.1 mi10 yd00
Jun 7, 1971F00.1 mi10 yd00
Jun 7, 1971F00.1 mi10 yd00
Jul 24, 1966F00.1 mi10 yd00
May 8, 1965F00.1 mi10 yd00
Apr 19, 1955F03.8 mi50 yd00
Apr 19, 1955F07.2 mi50 yd02
May 29, 1953F20.5 mi33 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.