South Dakota, 1991

Tornadoes and Hail in South Dakota, May 12, 1991

May 12, 1991 · NWS ABR · 18 events in 12 counties and zones

13 hail, 4 tornado, 1 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$250
Crop damage
None recorded
Events
18

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Event by event

13 hail, 4 tornado, 1 thunderstorm wind. Local standard time, as filed.

Hail, Corson

When
May 12, 1:43 PM CST
Where
Corson County
Measured
0.75 in hail
Coordinates
45.900, -101.020

Hail, Corson

When
May 12, 2:25 PM CST
Where
Corson County
Measured
0.75 in hail
Coordinates
45.820, -100.820

Hail, Hughes

When
May 12, 2:54 PM CST
Where
Hughes County
Measured
1.75 in hail
Coordinates
44.420, -99.730

Hail, Brule

When
May 12, 3:52 PM CST
Where
Brule County
Measured
0.75 in hail
Coordinates
43.750, -98.950

Tornado, Hanson

When
May 12, 4:00 PM CST
Where
Hanson County
Rating
F0
Path length
0.1 mi
Path width
50 yd
Coordinates
43.730, -97.820

Tornado, Charles Mix

When
May 12, 4:30 PM CST
Where
Charles Mix County
Rating
F0
Path length
0.5 mi
Path width
100 yd
Property damage
$250
Coordinates
43.320, -98.950

Hail, Sanborn

When
May 12, 4:41 PM CST
Where
Sanborn County
Measured
1.75 in hail
Coordinates
43.980, -98.130

Tornado, Aurora

When
May 12, 5:05 PM CST
Where
Aurora County
Rating
F0
Path length
0.1 mi
Path width
50 yd
Coordinates
43.500, -98.430

Thunderstorm Wind, Davison

When
May 12, 5:20 PM CST
Where
Davison County
Measured
55 kt (63 mph)
Coordinates
43.730, -98.250

Hail, Brown

When
May 12, 5:45 PM CST
Where
Brown County
Measured
0.75 in hail
Coordinates
45.470, -98.550

Tornado, Davison

When
May 12, 5:53 PM CST
Where
Davison County
Rating
F0
Path length
0.5 mi
Path width
100 yd
Coordinates
43.600, -97.950

Hail, Miner

When
May 12, 6:38 PM CST
Where
Miner County
Measured
1.75 in hail
Coordinates
44.020, -97.530

Hail, McCook

When
May 12, 7:05 PM CST
Where
McCook County
Measured
0.75 in hail
Coordinates
43.570, -97.380

Hail, Minnehaha

When
May 12, 7:25 PM CST
Where
Minnehaha County
Measured
0.75 in hail
Coordinates
43.650, -97.070

Hail, Minnehaha

When
May 12, 7:40 PM CST
Where
Minnehaha County
Measured
0.75 in hail
Coordinates
43.530, -96.730

Hail, Minnehaha

When
May 12, 7:45 PM CST
Where
Minnehaha County
Measured
0.75 in hail
Coordinates
43.770, -96.750

Hail, McCook

When
May 12, 7:58 PM CST
Where
McCook County
Measured
0.75 in hail
Coordinates
43.600, -97.300

Hail, Minnehaha

When
May 12, 8:00 PM CST
Where
Minnehaha County
Measured
0.75 in hail
Coordinates
43.670, -96.820

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in South Dakota in 1991Every state in 1991This day in weather historyThe tornado archive for South Dakota, 1991Warnings in South Dakota, May 1991

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10123930, 10123931, 10123932, 10123933, 10123934, 10123935, 10123936, 10123937, 10123938, 10123939, 10123940, 10123941, 10123942, 10123943, 10123944, 10123945, 10123946, 10123947.