Hail, Custer
- When
- June 25, 12:03 PM MST
- Where
- Custer County, 1.35 mi E of Custer
- Measured
- 1 in hail
- Reported by
- Public
- Coordinates
- 43.771, -103.573
Flash Flood and Hail in South Dakota, June 25, 2020
A severe thunderstorm developed in the Custer area and remained nearly stationary for close to an hour and a half. The storm produced a lot of hail around quarter size, which accumulated six inches deep in some areas.
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
- 3
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 UNR wrote it up.
A severe thunderstorm developed in the Custer area and remained nearly stationary for close to an hour and a half. The storm produced a lot of hail around quarter size, which accumulated six inches deep in some areas. The large amounts of hail and heavy rain also caused flash flooding on the east side of Custer.
The radar
The Rapid City radar (KUDX), 71 km away, was scanning. The volume nearest the first event began at 19:04 UTC.
Event by event
2 hail, 1 flash flood. Local standard time, as filed.
Hail, Custer
- When
- June 25, 12:32 PM MST
- Where
- Custer County, Custer
- Measured
- 1.75 in hail
- Reported by
- Emergency Manager
- Coordinates
- 43.770, -103.600
Hail was mostly to quarter size, with a few near golf ball size, and accumulated to six inches deep, with a few piles larger than two feet.
Flash Flood, Custer
- When
- June 25, 12:50 PM MST to 4:00 PM MST
- Where
- Custer County, 2.07 mi N of Custer to 4.54 mi S of Custer
- Cause
- Heavy Rain
- Reported by
- Emergency Manager
- Coordinates
- 43.800, -103.600
Runoff from heavy rain and copious amounts of hail combined to produce street flooding in Custer. The excessive runoff overwhelmed culverts and caused flooding along French Creek upstream of Stockade Lake.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Hail and Damaging Winds in Maryland, June 25, 2020
- Damaging Winds in Mississippi, June 25, 2020
- Hail and Damaging Winds in Virginia, June 25, 2020
- Damaging Winds in Virginia, June 25, 2020
- Damaging Winds in California, June 25, 2020
- Damaging Winds in Louisiana, June 25, 2020
- Damaging Wind in District of Columbia, June 25, 2020
- Flash Flooding and Hail in South Dakota, June 25 to 26, 2020
- Damaging Winds in Alabama, June 25, 2020
- Damaging Winds in Pennsylvania, June 25, 2020
- Hail and Damaging Winds in North Dakota, June 25, 2020
- Hail and Damaging Winds in Florida, June 25, 2020
More
Every storm in South Dakota in 2020Every state in 2020This day in weather historyWarnings in South Dakota, June 2020
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: 893710, 893715, 904934.