The rain will be "generally beneficial" in the Los Angeles area, but there is a small risk of burn scar debris flows.
For the first time in six years, water is gushing through a unique spillway in Lake Berryessa, just north of San Francisco.
On Thursday at 6:13 p.m. a flood advisory was issued by the NWS Los Angeles/Oxnard CA in effect until 10 p.m. The advisory is for Los Angeles as well as Santa Barbara and Ventura counties.