Thunderstorm Wind, Corson
- When
- August 11, 10:45 PM CST
- Where
- Corson County, 10 mi SW of Mc Intosh
- Measured
- 61 kt (70 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 45.820, -101.500
Hail and Damaging Winds in South Dakota, August 11 to 12, 1999
5 thunderstorm wind, 1 hail, 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
- 6
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.
The radar
The Bismarck radar (KBIS), 120 km away, was scanning. The volume nearest the first event began at 04:42 UTC.
Event by event
5 thunderstorm wind, 1 hail. Local standard time, as filed.
Thunderstorm Wind, Corson
- When
- August 11, 11:15 PM CST
- Where
- Corson County, Mc Intosh
- Measured
- 61 kt (70 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 45.920, -101.350
Winds gusting to 70 mph brought down several trees in Mcintosh.
Thunderstorm Wind, Corson
- When
- August 11, 11:45 PM CST
- Where
- Corson County, Wakpala
- Measured
- 52 kt (60 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 45.670, -100.530
Hail, Dewey
- When
- August 12, 12:05 AM CST
- Where
- Dewey County, Isabel
- Measured
- 0.75 in hail
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 45.380, -101.430
Thunderstorm Wind, Walworth
- When
- August 12, 1:15 AM CST
- Where
- Walworth County, Mobridge
- Measured
- 52 kt (60 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 45.530, -100.430
Thunderstorm Wind, Campbell
- When
- August 12, 1:20 AM CST
- Where
- Campbell County, 12 mi SW of Mound City
- Measured
- 52 kt (60 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 45.600, -100.250
What these are
- 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.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado in Utah, August 11, 1999
- Hail and Damaging Wind in Kansas, August 11 to 26, 1999
- Hail and Damaging Wind in South Dakota, August 11, 1999
- Hail in Colorado, August 11, 1999
- Damaging Winds in Missouri, August 11, 1999
- Hail and Damaging Winds in Virginia, August 11, 1999
- Tornado in North Dakota, August 11, 1999
- Tornado in Wyoming, August 11, 1999
- Hail in Colorado, August 11, 1999
- Hail and Damaging Winds in Wyoming, August 11, 1999
- Hail and Lightning Strike in South Dakota, August 11, 1999
- Hail and Damaging Winds in North Carolina, August 11, 1999
More
Every storm in South Dakota in 1999Every state in 1999This day in weather historyWarnings in South Dakota, August 1999
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 2026-10-01. Each event’s entry at NCEI: 5709926, 5709927, 5709928, 5709929, 5709930, 5709931.