Winter storm hits California

Fierce winds toppled trucks on a major Bay Area bridge and knocked out power to more than 100,000 people in Sacramento as wicked winter weather moved into California on Friday.

Workers fill sandbags in Malibu, California, Thursday as residents prepare for potential mudslides.

Forecasters said the Pacific storms could dump more than 10 feet of snow on California mountains by Sunday.

"Travel is not advised in the mountain areas this weekend. It could be a life-threatening situation for you," CNN meteorologist Jacqui Jeras said Friday.

"The combination of heavy snow and powerful winds will likely cause frequent whiteout conditions at the highest elevations," National Weather Service forecasters said.

"Travel in the Sierra will put your life at risk. Extremely high snowfall rates will make it impossible for road crews and emergency personnel to keep roads passable and to assist stranded vehicles."

Winds in the mountains could gust to 145 mph, forecasters said, the strength of a Category 4 hurricane. A Category 4 can inflict extreme damage.