Flood Watch issued September 17 at 3:21PM PDT until September 19 at 2:00AM PDT by NWS Los Angeles/Oxnard CA

Small modification in timing description, otherwise no change. * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of southwest California, including the following areas, Antelope Valley, Cuyama Valley, Eastern Antelope Valley Foothills, Eastern San Gabriel Mountains, Eastern Santa Monica Mountains Recreational Area, Interstate 5 Corridor, Los Angeles County San Gabriel Valley, Malibu Coast, Northern Ventura County Mountains, San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Barbara County Interior Mountains, Southern Ventura County Mountains, Western Antelope Valley Foothills, Western San Gabriel Mountains and Highway 14 Corridor and Western Santa Monica Mountains Recreational Area. * WHEN...From early Thursday morning through late Thursday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Rain rates up to or locally exceeding one half inch per hour are possible. - http://www.weather.gov/safety/flood