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With three to four inches of snow falling in the Tri-Cities area, workers at the vitrification plant project at the Hanford nuclear reservation were told to stay home.

In the Portland area, roads were a mess and motorists couldn't see lines on some roads due to snow. Three inches of snow was on the ground in the Salem, Oregon area.

The fierce snowstorm closed nearly 150 miles of Interstate 5 in Northern California and part of southern Oregon on Monday, stranding hundreds of motorists, some for as long as 14 hours, the California Highway Patrol said.

The freeway was shut down from Medford, Ore., to an area near Redding, and there was no estimate when crews would be able to get to the stranded drivers, said Jennifer Bryan, a dispatcher in the patrol's Yreka dispatch center.