Tornadoes · United States · South Dakota

Tornadoes in Brown County, South Dakota

86 tornadoes have crossed Brown County since 1950, 1st of the 66 counties in South Dakota with a tornado on record, an average of 1.1 a year. They have killed 3 people and injured 35. 1 was rated F4 or EF4 and above.

The rating scale

Tracks are drawn in the color of the rating. The United States rated tornadoes on Ted Fujita’s F scale until 31 January 2007 and on the Enhanced Fujita scale after it. Both run from 0 to 5, and both rate the damage rather than measure the wind: the speeds are what that damage is taken to imply.

  1. F0 / EF040 to 72 mph on the F scale, 65 to 85 mph on the EF scale

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. F1 / EF173 to 112 mph on the F scale, 86 to 110 mph on the EF scale

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. F2 / EF2113 to 157 mph on the F scale, 111 to 135 mph on the EF scale

    Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

  4. F3 / EF3158 to 206 mph on the F scale, 136 to 165 mph on the EF scale

    Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

  5. F4 / EF4207 to 260 mph on the F scale, 166 to 200 mph on the EF scale

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. F5 / EF5261 to 318 mph on the F scale, over 200 mph on the EF scale

    Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

  7. Unrated

    The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Now

Tornadoes
86
Deaths
3
Injuries
35
F4 and above
1
Worst on record
F4, June 23, 2002

The deadliest in Brown County

The strongest

Every year with a tornado

The 43 years of the 76 in the record with a tornado in Brown County. Each year links to every tornado in South Dakota that year.

YearTornadoesDeathsInjuriesStrongest
20251EF0
20223EF0
20201EF0
20171EF0
20121EF0
20102EF2
20081EF0
20071EF0
20055F1
20042F0
20025F4
20001F0
19991F0
19981F0
199671F3
19951F0
19941F0
19931F0
19902F0
19871F1
19861F0
19853F0
19843F1
19821F0
19811F0
19807F0
19791F1
1978115F2
19772F0
19753F1
19741F0
1973413F3
19722F0
19711F0
19702F0
196926F3
1966213F2
19651F3
1961217F3
19601F0
19591F0
19573F0
19552F2

Every tornado that crossed Brown County

86 tornadoes, newest first.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
July 13, 20254:49 PM CDTEF0Brown0.110
May 7, 20228:37 PM CDTEF0Brown0.010
May 7, 20228:15 PM CDTEF0Brown0.010
May 7, 20228:12 PM CDTEF0Brown0.010
June 7, 20208:30 PM CDTEF0Brown5.350
June 13, 20176:05 PM CDTEF0Brown0.110
June 1, 20125:27 PM CDTEF0Brown0.510
May 22, 20109:10 PM CDTEF2Brown1.3100
May 22, 20108:01 PM CDTEF2Edmunds18.6200
August 14, 20083:35 PM CDTEF0Brown0.110
July 15, 200711:18 PM CDTEF0Brown0.110
June 26, 20057:22 PM CDTF0Brown0.210
June 7, 200511:35 PM CDTF1Brown0.130
June 7, 200511:20 PM CDTF1Brown0.130
June 7, 200511:07 PM CDTF0Brown0.120
May 8, 20054:42 PM CDTF0Brown0.125
May 29, 20046:22 PM CDTF0Brown0.330
May 29, 20046:08 PM CDTF0Brown0.110
June 23, 20028:30 PM CDTF0Brown0.050
June 23, 20028:24 PM CDTF4Brown9.0900
June 23, 20027:53 PM CDTF3Brown10.0900
June 23, 20027:43 PM CDTF0Brown0.350
June 23, 20027:34 PM CDTF1McPherson5.0500
July 11, 20001:45 PM CDTF0Brown0.110
July 27, 19994:15 PM CDTF0Brown0.510
June 26, 19984:00 PM CDTF0Brown0.230
July 17, 19967:36 PM CDTF0Brown0.310
May 31, 19966:21 PM CDTF0Brown0.310
May 31, 19966:05 PM CDTF0Brown0.310
May 31, 19965:52 PM CDTF3Brown32.04001$750,000
May 31, 19965:40 PM CDTF0Brown0.515
May 31, 19965:30 PM CDTF1Brown1.050
May 31, 19965:25 PM CDTF0Brown0.315
July 16, 19952:45 PM CDTF0Brown0.110
July 18, 19947:30 PM CDTF0Brown0.110
June 22, 199310:25 PM CDTF0Brown0.530
June 1, 19909:45 PM CDTF0Brown3.030
June 1, 19909:15 PM CDTF0Brown0.320
August 15, 19873:20 PM CDTF1Spink5.050
July 17, 19865:53 PM CDTF0Brown0.123
August 22, 198510:52 PM CDTF0Brown0.210
July 17, 198511:15 AM CDTF0Brown0.210
May 8, 19857:12 PM CDTF0Brown0.110
August 26, 19845:50 PM CDTF0Brown0.110
August 19, 19848:30 PM CDTF1Brown0.110$5,000 to $50,000
July 2, 19849:20 PM CDTF0Brown0.110
June 11, 19825:00 PM CDTF0Brown0.110under $50
June 21, 19813:45 PM CDTF0Brown0.110
August 20, 19803:26 AM CDTF0Brown0.133$5,000 to $50,000
May 29, 19803:42 PM CDTF0Brown0.110
May 29, 19803:42 PM CDTF0Brown0.110
May 29, 19803:42 PM CDTF0Brown0.110
May 29, 19803:42 PM CDTF0Brown0.110
May 29, 19803:42 PM CDTF0Brown0.110
May 29, 19803:42 PM CDTF0Brown0.110
June 19, 19796:55 PM CDTF1Brown0.110$500,000 to $5 million
June 15, 197811:45 PM CDTF2Brown0.11015$50,000 to $500,000
July 10, 197710:35 PM CDTF0Brown0.110
June 22, 19773:30 PM CDTF0Brown0.613
June 20, 197511:13 PM CDTF1Brown2.520$5,000 to $50,000
June 20, 197511:00 PM CDTF0Brown0.110
June 19, 19759:30 PM CDTF0Brown0.110$500 to $5,000
June 10, 19745:30 PM CDTF0Brown15.0100
August 31, 19734:47 PM CDTF0Brown1.750
July 1, 19736:15 PM CDTF3Brown0.33013$5,000 to $50,000
June 17, 19736:15 PM CDTF1Brown0.110$5,000 to $50,000
June 15, 19736:30 PM CDTF1Brown1.013$500 to $5,000
July 25, 19726:58 PM CDTF0Brown0.110
July 19, 19725:45 PM CDTF0Brown0.110
July 5, 19718:05 PM CDTF0Brown0.110
June 16, 19707:10 PM CDTF0Brown0.110
June 15, 197012:15 AM CDTF0Brown0.110
June 25, 19696:00 PM GMT-5F0Brown0.110
June 25, 19694:15 PM GMT-5F3Brown1.51336$50,000 to $500,000
July 31, 19669:00 PM GMT-5F2Brown2.325313$50,000 to $500,000
June 24, 196610:30 PM GMT-5F1Brown5.910$5,000 to $50,000
May 20, 19655:45 PM GMT-5F3Brown3.8400$5,000 to $50,000
June 28, 19617:30 PM GMT-5F2McPherson49.710$50,000 to $500,000
June 21, 19613:30 PM GMT-5F3Brown156.31017$500 to $5,000
June 26, 19608:30 PM GMT-5F0Brown0.110$500 to $5,000
June 16, 19596:45 PM GMT-5F0Brown0.110
June 13, 19574:30 PM GMT-5F0Brown0.110under $50
June 13, 19574:30 PM GMT-5F0Brown0.110under $50
June 12, 19579:30 PM GMT-5F0Brown0.110under $50
June 28, 19557:30 PM GMT-5F2Brown5.450$5,000 to $50,000
April 19, 19556:00 PM GMT-6F2Brown4.650$50 to $500

Nearby

Warnings in force in Brown CountyThe forecast for Brown CountyThe live radar over Brown CountyEvery county in South Dakota

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.