Hail, Bennett
- When
- July 17, 5:10 PM CST
- Where
- Bennett County
- Measured
- 1.5 in hail
- Coordinates
- 43.170, -101.750
Tornado and Hail in South Dakota, July 17, 1978
8 thunderstorm wind, 1 hail, 1 tornado, 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
- None recorded
- 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
8 thunderstorm wind, 1 hail, 1 tornado. Local standard time, as filed.
Thunderstorm Wind, Todd
- When
- July 17, 6:00 PM CST
- Where
- Todd County
- Measured
- 56 kt (64 mph)
- Coordinates
- 43.130, -100.920
Thunderstorm Wind, Tripp
- When
- July 17, 6:07 PM CST
- Where
- Tripp County
- Coordinates
- 43.070, -99.900
Thunderstorm Wind, Todd
- When
- July 17, 6:30 PM CST
- Where
- Todd County
- Measured
- 78 kt (90 mph)
- Coordinates
- 43.250, -100.670
Thunderstorm Wind, Gregory
- When
- July 17, 7:50 PM CST
- Where
- Gregory County
- Coordinates
- 43.070, -99.380
Tornado, Charles Mix
- When
- July 17, 8:10 PM CST
- Where
- Charles Mix County
- Path width
- 33 yd
- Coordinates
- 43.220, -98.820
Thunderstorm Wind, Charles Mix
- When
- July 17, 9:00 PM CST
- Where
- Charles Mix County
- Coordinates
- 43.150, -98.550
Thunderstorm Wind, Charles Mix
- When
- July 17, 9:00 PM CST
- Where
- Charles Mix County
- Coordinates
- 43.380, -98.720
Thunderstorm Wind, Ziebach
- When
- July 17, 9:56 PM CST
- Where
- Ziebach County
- Coordinates
- 43.050, -97.270
Thunderstorm Wind, Lincoln
- When
- July 17, 10:35 PM CST
- Where
- Lincoln County
- Coordinates
- 43.230, -96.850
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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.
- 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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
More
Every storm in South Dakota in 1978Every state in 1978This day in weather historyThe tornado archive for South Dakota, 1978
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: 10126715, 10126716, 10126717, 10126718, 10126719, 10126720, 10126721, 10126722, 10126723, 10126724.