Hail, Pennington
- When
- May 17, 11:50 AM MST
- Where
- Pennington County, 4.85 mi NW of Rapid City
- Measured
- 1 in hail
- Reported by
- Public
- Coordinates
- 44.129, -103.299
Flood and Hail in South Dakota, May 17, 2023
A severe thunderstorm developed just northwest of Rapid City and slowly drifted north and east through portions of the Rapid City, Black Hawk, and Summerset areas; producing hail around quarter size and heavy rain. Brief heavy rain and large amounts of small hail blocked storm drains and caused minor flooding across parts of Rapid City, with elevated stream levels on Rapid Creek east of Rapid…
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
- 4
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 just northwest of Rapid City and slowly drifted north and east through portions of the Rapid City, Black Hawk, and Summerset areas; producing hail around quarter size and heavy rain. Brief heavy rain and large amounts of small hail blocked storm drains and caused minor flooding across parts of Rapid City, with elevated stream levels on Rapid Creek east of Rapid City.
The radar
The Rapid City radar (KUDX), 37 km away, was scanning. The volume nearest the first event began at 18:49 UTC.
Event by event
3 hail, 1 flood. Local standard time, as filed.
Hail, Meade
- When
- May 17, 12:13 PM MST
- Where
- Meade County, Black Hawk
- Measured
- 1 in hail
- Reported by
- Public
- Coordinates
- 44.150, -103.310
Hail, Meade
- When
- May 17, 12:31 PM MST
- Where
- Meade County, 2.07 mi N of Black Hawk
- Measured
- 0.88 in hail
- Reported by
- Trained Spotter
- Coordinates
- 44.180, -103.310
Flood, Pennington
- When
- May 17, 12:45 PM MST to 3:30 PM MST
- Where
- Pennington County, 4.03 mi E of Hisega to 2.58 mi SE of Rapid City
- Cause
- Heavy Rain
- Reported by
- Law Enforcement
- Coordinates
- 44.060, -103.320
Drifts of small hail blocked storm drains; causing minor flooding of roads, yards, and fields from Chapel Valley and the west Rapid City area to Rapid Valley.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood and Flood in American Samoa, May 17, 2023
- Dense Smoke in North Dakota, May 17, 2023
- Frost and Freeze in New York, May 17 to 18, 2023
- Flash Flood and Damaging Winds in Alabama, May 17, 2023
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, May 17, 2023
- Hail and Damaging Winds in Florida, May 17, 2023
- Dense Smoke in South Dakota, May 17, 2023
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, May 17, 2023
- Hail in Texas, May 17, 2023
- Hail and Damaging Winds in South Carolina, May 17, 2023
- Hail in Wyoming, May 17, 2023
- Hail in Arizona, May 17, 2023
More
Every storm in South Dakota in 2023Every state in 2023This day in weather historyWarnings in South Dakota, May 2023
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: 1088453, 1088454, 1088459, 1093502.