Several bands of thunderstorms during the night produced heavy rain over the southern Black Hills. Runoff from the rain caused flooding in Wind Cave National Park and along Lame Johnny and Beaver Creeks east of the Black Hills.
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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.
Several bands of thunderstorms during the night produced heavy rain over the southern Black Hills. Runoff from the rain caused flooding in Wind Cave National Park and along Lame Johnny and Beaver Creeks east of the Black Hills.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Rapid City, SD wrote its last area forecast discussion before the first event at Jun 20, 2:20 AM MST, 2 hours 50 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Water was reported over Custer County Road 101 between Highways 385 and 79.
Beaver Creek flowed over Beaver Creek Road. The river gauge four miles south of Buffalo Gap crested at 7.54 feet, above its flood stage of 7.5 feet, at 945 AM MST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2010Every state in 2010This day in weather historyWarnings in South Dakota, June 2010
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: 234926, 234927.