Flash Flood — San Bernardino, California

1999-07-11 · near Forest Falls, San Bernardino, California

Wider weather episode

Thunderstorms redeveloped during the afternoon and moved slowly west southwest down the valley. Rainfall rates were high with over an inch of rain falling in less than a half hour. Radar rainfall estimates were near three inches. As a result creeks and streams feeding into Mill Creek rapidly filled and created a 25 foot high wall of water, rocks, and mud. Seven homes were destroyed, 11 sustained moderate to severe damage, and 35 others had minor damage. Roads were covered with 10 feet of rocks, mud, and debris. Flash flood waters continued to move down Mill Creek and into the Santa Ana River, causing road flooding in Redlands .

Source: NOAA Storm Events Database, event_id 5706929. Narrative written by the NWS forecast office that issued the report.