Sep 2, 2007
A very moist, unstable airmass and weak easterly flow resulted in another round of thunderstorms across Southern California. Thunderstorms initiated over the higher terrain and then spread westward into the inland valleys. Severe weather and flash flooding were reported with a few of these storms.
Source: NOAA National Weather Service Storm Events Database (event 60710). 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.