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Landslides of rock and mud closed roadways Friday across California as heavy rains kicked off what will be a series of storms poised to usher in the new year with downpours and potential flooding across much of the state and multiple feet of snow in the Sierra Nevada.
The atmospheric river storm, a long and wide plume of moisture pulled in from the Pacific Ocean, began sweeping across the northern part of the state Friday and was expected to bring more rain through Saturday, according to the National Weather Service in Sacramento.
A winter storm warning was in effect into Sunday for the upper elevations of the Sierra from south of Yosemite National Park to north of Lake Tahoe, where as much as 5 feet (1.5 meters) of snow is possible atop the mountains, the National Weather Service said in Reno, Nevada.
A flood watch was in effect across much of Northern California through New Year’s Eve. Officials warned that rivers and streams could overflow and urged residents to get sandbags ready.
Landslides already had closed routes in the San Francisco Bay Area, between Fremont and Sunol, as well as in Mendocino County near the unincorporated community of Piercy and in the Mendocino National Forest, where crews cleared debris into Friday night.
Humboldt County, where a 6.4 magnitude earthquake struck on Dec. 20, also saw roadways begin to flood, according to the National Weather Service’s Eureka office.
