Hail, Brule
- When
- October 9, 2:31 PM CST to 2:32 PM CST
- Where
- Brule County, 5.11 mi NE of Lyonville
- Measured
- 1.25 in hail
- Reported by
- Social Media
- Coordinates
- 43.930, -98.910
Hail and Damaging Winds in South Dakota, October 9, 2021
A line of thunderstorms developed along a cold front as it moved out of central South Dakota. With 1000-1500 J/kg MLCAPE and 40 to 45 knots of deep-layer shear, an isolated supercell developed on the south end of the line and resulted in spotty large hail and damaging wind.
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
- $5,000
- Crop damage
- $60,000
- Events
- 8
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.
What happened
The episode as NWS FSD wrote it up.
A line of thunderstorms developed along a cold front as it moved out of central South Dakota. With 1000-1500 J/kg MLCAPE and 40 to 45 knots of deep-layer shear, an isolated supercell developed on the south end of the line and resulted in spotty large hail and damaging wind.
The radar
The Aberdeen radar (KABR), 174 km away, was scanning. The volume nearest the first event began at 20:31 UTC.
Event by event
6 hail, 2 thunderstorm wind. Local standard time, as filed.
Hail, Jerauld
- When
- October 9, 2:46 PM CST to 2:48 PM CST
- Where
- Jerauld County, 0.85 mi NW of Crow Lake
- Measured
- 1 in hail
- Reported by
- Social Media
- Coordinates
- 43.960, -98.740
Hail, Jerauld
- When
- October 9, 2:49 PM CST to 2:51 PM CST
- Where
- Jerauld County, 0.85 mi NW of Crow Lake
- Measured
- 1.75 in hail
- Crop damage
- $60,000
- Reported by
- Law Enforcement
- Coordinates
- 43.960, -98.740
Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
Hail, Jerauld
- When
- October 9, 2:51 PM CST to 2:53 PM CST
- Where
- Jerauld County, 2.13 mi NNW of Crow Lake
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 43.980, -98.740
A few tree branches up to 2 inches in diameter were also downed by winds estimated at less than 50 mph.
Hail, Jerauld
- When
- October 9, 2:56 PM CST to 2:58 PM CST
- Where
- Jerauld County, 2.13 mi NNW of Crow Lake
- Measured
- 1.75 in hail
- Reported by
- Trained Spotter
- Coordinates
- 43.980, -98.740
Hail, Jerauld
- When
- October 9, 3:30 PM CST to 3:32 PM CST
- Where
- Jerauld County, 2.76 mi S of Alpena
- Measured
- 1 in hail
- Reported by
- Public
- Coordinates
- 44.140, -98.370
Thunderstorm Wind, Jerauld
- When
- October 9, 3:30 PM CST to 3:32 PM CST
- Where
- Jerauld County, 2.76 mi S of Alpena
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Public
- Coordinates
- 44.140, -98.370
Wind gusts estimated from damage to small tree limbs.
Thunderstorm Wind, Jerauld
- When
- October 9, 3:32 PM CST to 3:33 PM CST
- Where
- Jerauld County, 1.21 mi SW of Alpena
- Measured
- 56 kt (64 mph) estimated gust
- Property damage
- $5,000
- Reported by
- Public
- Coordinates
- 44.170, -98.390
Thunderstorm winds damaged siding on a house. Property damage costs are a rough estimate.
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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Rip Current in Puerto Rico, October 9, 2021
- Flash Flooding and Heavy Rain in North Carolina, October 9, 2021
- Tornado and Damaging Winds in Minnesota, October 9, 2021
- Tornadoes and Hail in South Dakota, October 9, 2021
- High Wind in Colorado, October 9, 2021
- Tornado and Damaging Winds in North Dakota, October 9, 2021
- Tornadoes and Damaging Wind in Minnesota, October 9, 2021
- High Wind in Wyoming, October 9, 2021
- Marine Thunderstorm Winds in Gulf of Mexico, October 9, 2021
- Marine Thunderstorm Wind in South Atlantic Coastal Waters, October 9, 2021
- Damaging Wind in Florida, October 9, 2021
- Marine Thunderstorm Wind in South Atlantic Coastal Waters, October 9, 2021
More
Every storm in South Dakota in 2021Every state in 2021This day in weather historyWarnings in South Dakota, October 2021
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: 989673, 989674, 989675, 989676, 989677, 989678, 989680, 989679.