Aug 16, 2018
Monsoonal moisture moved into Southern California on August 15th and resulted in numerous showers and thunderstorms across the region. Heavy rain fell in the San Diego County Mountains on August 15th, and became more widespread on August 16th and 17th. Mount Laguna picked up 3.20 inches of rainfall on August 17th. Numerous areas of flash flooding and debris flows were reported throughout Southern California, particularly in the Riverside and San Bernardino County mountain areas. A landspout torn
Source: NOAA National Weather Service Storm Events Database (event 782676). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Riverside County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.