Slow moving and stationary thunderstorms with heavy rain resulted in flash flooding over portions of southwestern South Dakota.
Every event with a place to put it. Tap one for its entry below.
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 episode as NWS UNR wrote it up.
Slow moving and stationary thunderstorms with heavy rain resulted in flash flooding over portions of southwestern South Dakota.
The Rapid City radar (KUDX), 106 km away, was scanning. The volume nearest the first event began at 22:29 UTC.
2 flash flood. Local standard time, as filed.
Runoff from heavy rain produced street flooding in Manderson and along Wounded Knee Creek. BIA 33 was flooded north of Manderson.
Runoff from heavy rain washed out a culvert and a 16 foot section of SD Highway 44 at Fish Creek Road. Flooding occurred along Fish Creek and Pass Creek in eastern Jackson County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2020Every state in 2020This day in weather historyWarnings in South Dakota, July 2020
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: 912074, 912082.