The warning extends from Davenport, Calif., about 10 miles northwest of Santa Cruz, to the Douglas-Lane county line in Oregon, about 10 miles southwest of Florence. 

The first waves are expected to arrive at 12:10 p.m. for San Francisco Bay Area, Karleisa Rogacheski, a meteorologist for the weather service told SFGATE. In areas farther north, such as Fort Bragg, the waves could come sooner, she said.