Jul 22, 2013
A low pressure system from the East brought a surge of subtropical monsoon moisture into the region. These ingredients set off periods of showers and thunderstorms, with areas of flash flooding affecting the San Diego, Riverside and San Bernardino County mountains, as well as the high desert on the 21st and 22nd, including significant rainfall and flash flooding the morning of the 21st, resulting from a nocturnal MCS. Rainfall amounts varied widely, though some of the stronger storms produced ve
Source: NOAA National Weather Service Storm Events Database (event 472220). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in San Diego County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.