Hail, Brown
- When
- May 12, 6:00 PM CST
- Where
- Brown County
- Measured
- 2.75 in hail
- Coordinates
- 45.400, -98.180
Tornadoes and Hail in South Dakota, May 12, 1984
4 hail, 3 tornado, 3 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $5.0 million
- Crop damage
- None recorded
- Events
- 10
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
4 hail, 3 tornado, 3 thunderstorm wind. Local standard time, as filed.
Tornado, Clark
- When
- May 12, 6:10 PM CST
- Where
- Clark County
- Rating
- F3
- Path length
- 14 mi
- Path width
- 1,320 yd
- Property damage
- $2.5 million
- Coordinates
- 44.880, -97.730
Tornado, Codington
- When
- May 12, 6:28 PM CST
- Where
- Codington County
- Rating
- F3
- Path length
- 13 mi
- Path width
- 1,320 yd
- Property damage
- $2.5 million
- Coordinates
- 44.830, -97.500
Tornado, Codington
- When
- May 12, 6:32 PM CST
- Where
- Codington County
- Rating
- F0
- Path width
- 33 yd
- Coordinates
- 44.800, -97.250
Hail, Codington
- When
- May 12, 7:00 PM CST
- Where
- Codington County
- Measured
- 2.75 in hail
- Coordinates
- 44.880, -97.450
Thunderstorm Wind, Codington
- When
- May 12, 7:00 PM CST
- Where
- Codington County
- Coordinates
- 44.880, -97.120
Hail, Hamlin
- When
- May 12, 8:00 PM CST
- Where
- Hamlin County
- Measured
- 1.75 in hail
- Coordinates
- 44.570, -97.020
Hail, Brookings
- When
- May 12, 10:15 PM CST
- Where
- Brookings County
- Measured
- 0.75 in hail
- Coordinates
- 44.370, -96.800
Thunderstorm Wind, Brookings
- When
- May 12, 10:15 PM CST
- Where
- Brookings County
- Measured
- 52 kt (60 mph)
- Coordinates
- 44.370, -96.800
Thunderstorm Wind, Moody
- When
- May 12, 10:38 PM CST
- Where
- Moody County
- Measured
- 50 kt (58 mph)
- Coordinates
- 44.050, -96.580
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 1984Every state in 1984This day in weather historyThe tornado archive for South Dakota, 1984
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: 10123061, 10123062, 10123063, 10125832, 10125833, 10125834, 10125835, 10125836, 10125837, 10125838.