Jul 19, 2015
Very moist and unstable conditions were present across Joshua Tree National Park on July 19th, due in large part to a significant infusion of tropical moisture from former hurricane Dolores. During the afternoon hours, thunderstorms developed across much of the park, and they produced intense downpours with peak rain rates well in excess of 2 inches per hour. The very heavy rainfall led to some flash flooding in the western portion of Joshua Tree National Park which also caused debris to flow ac
Source: NOAA National Weather Service Storm Events Database (event 582850). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in San Bernardino County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.