Jul 30, 2005
An approaching mid-level trough, combined with steep lapse rates, surface dewpoints in the low to mid 70s, and precipitable water values of around 2 inches helped trigger severe thunderstorms across the mountains and deserts during the afternoon and evening hours of the 30th. The strongest storms formed over the San Bernardino Mountains where numerous reports of hail and flooding were received. This day marked the 11th straight day of thunderstorms in the San Diego CWA.
Source: NOAA National Weather Service Storm Events Database (event 5461516). 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.