Driving rain could drastically reduce visibility, Chinchar warned.
Meanwhile, power is still out and cars submerged across Southern California, which experienced one of its most drenching storms in recent years.
More than 131,000 customers lost power Friday night, officials said. Late Saturday evening, 6,100 people still remained without power, Southern California Edison told CNN. Sinkholes, localized floods and downed trees and power lines also were reported.
In Victorville in San Bernardino County, one person was found dead Friday in a flooded vehicle, firefighters said. A second storm victim, a 55-year-old man, was electrocuted when a power line fell Friday in the Sherman Oaks area of Los Angeles, the fire department said.
On Saturday, the Thousand Oaks Police Department said a body was recovered from a river gorge after floodwaters receded. Police didn't give any details about the identity of the victim.
Two people died Saturday evening following a traffic accident in San Diego due to the wet road conditions on Interstate 15, California Highway Patrol Sgt. Nicole Pacheco told CNN.
The rain headed for the north likely won't pose a threat to Oroville Dam
, officials said Saturday, thanks to falling water levels.
Skirting death as storm rages
The storm proved harrowing for one Los Angeles driver on Friday night, when the road beneath her car gave out, plunging her to the bottom of a 20-foot sinkhole, CNN affiliate KTLA-TV reported
"My car kept turning and turning upside down, and I was just like, 'I got to stay calm,' " Stephanie Scott told the TV station.
Scott managed to climb out of her car and yell for help. When firefighters arrived, they used ladders to free her from the sinkhole.
"It's totally a miracle," Scott told KTLA. About 10 minutes after she was pulled to safety, a van teetering on the edge of the hole crashed down on top of her car, the station reported.
In San Bernardino County, CNN affiliate KABC-TV captured the breathtaking moment
a fire truck plummeted off a washed-out roadway.
Rescuers were responding to a report that a semitrailer had fallen over the edge of southbound Interstate 15. KABC video
shows the fire truck's right rear tire dangling over the edge.
Suddenly, more pavement gives way, and the truck tumbles over the side.
No one was in the fire truck when it fell, and no one was hurt, fire officials told KABC. The driver of the semitrailer was also OK, KABC reported.
While some roads are washed away, others are covered in thick mud and rocks.
Mike Myers posted video to Twitter from Highway 138 in the West Cajon Valley showing a car with its tires buried in mud, the front bumper apparently ripped off.
The rain was so furious at one point, a parking garage in Los Angeles turned into a waterfall.
Rainfall totals by the National Weather Service
showed parts of Santa Barbara County have seen more than 7 inches of rain in two days. Parts of Ventura County have seen totals of more than 6 inches.
The storm has also blanketed higher elevations with snow.
Winter storm warnings were posted Saturday morning. National Weather Service said snow showers and gusting winds were expected.
Lake Oroville water levels drop
Officials near Oroville Dam are feeling comfortable despite rain in the forecast.
The water level is at 854 feet, 47 feet below the mark where a emergency spillway, which is under repair, is needed.
"We're looking very good. Our crews continue to fill holes in the emergency spillway," said Richard Cordova of Cal Fire.
The amount of water flowing into Lake Oroville is much less than the water allowed to flow out through a primary spillway in the dam.
Authorities have even reduced the outflow by 30%, allowing crews to clean up debris below the dam, the tallest in the United States.