Turbulent weather stretched from San Diego to Seattle. More than a foot (0.3 meters) of snow was reported near Port Angeles on Washington state’s Puget Sound. Portland, Oregon received a dusting, but the city was expected to get another 2.5 inches (6 centimeters) by Monday morning, according to the weather service.

A major Christmas weekend storm caused whiteout conditions and closed key highways amid blowing snow in mountains of Northern California and Nevada, with forecasters warning that travel in the Sierra Nevada could be difficult for several days, AP reports.

Authorities near Reno said three people were injured in a 20-car pileup on Interstate 395, where drivers described limited visibility on Sunday. Further west, a 70-mile (112-kilometer) stretch of Interstate 80 was shut until at least Monday from Colfax, California, through the Lake Tahoe region to the Nevada state line.

The California Department of Transportation also closed many other roads while warning of slippery conditions for motorists.

“Expect major travel delays on all roads,” the National Weather Service office in Reno, Nevada, said Sunday on Twitter. “Today is the type of day to just stay home if you can. More snow is on the way too!”

The weather service issued a winter storm warning for greater Lake Tahoe until 1 a.m. Tuesday because of possible “widespread whiteout conditions” and wind gusts that could top 45 mph (72 kph).

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