Oct 20, 2004
The second in a series of October storms brought with it heavy rain, thunderstorms, flash flooding, and funnel clouds. Very heavy rain upwards of 9 inches in the mountains caused serious flash flooding and debris flows in parts of the San Bernardino Mountains. Hundreds of car accidents were reported and several mountain roads were made impassible from mud and rockslides. Roadway flooding was commonplace all across southwest California. The combination of heavy rain and moderate winds caused many
Source: NOAA National Weather Service Storm Events Database (event 5427012). 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.