Event narrative (NOAA)
Major flash flooding hit the Grapevine Canyon area of Death Valley National Park. The Mesquite Springs Campground and Grapevine Ranger Station were evacuated; eight vehicles full of visitors and three park rangers were stranded overnight near Ubehebe Crater. Trenches up to six feet deep were cut into Scotty's Castle Road in Grapevine Canyon. 24 power poles were downed, the water treatment facility was heavily damaged, and water lines and the historic water tank were destroyed. The stables building and long house were heavily damaged. Two feet of mud and debris filled the visitor's center. Several inches of mud, rock, and debris also entered the cookhouse. Scotty's Castle measured 2.72 inches of rain in roughly five hours.
Other notable flash flood events in California
Source: NOAA/NCEI Storm Events Database. Deaths and injuries are those NOAA classifies as direct. Damage is the reporting office's estimate at the time and is not inflation-adjusted. This is a catalogue record, not a forecast.