High Surf Advisory in Effect for San Mateo County Coast Starting Saturday

Potential for large breaking waves in excess of 20 ft; large westerly swells projected from 14 - 18 ft.

A forecast for large swells along the San Mateo County and Central California Coast triggered the National Weather Service (NWS) to issue a high surf advisory this morning.

The advisory, which warns of hazardous conditions and a "dangerous near shore environment," is scheduled to be in effect from 4 p.m. Saturday, Jan. 21 until 10 a.m. on Sunday, Jan. 22.

The swells are projected to be between 14 - 18 ft. with a period of 13 to 14 seconds between wave peaks, according to the NWS.

The agency also advised that local beaches could experience large breaking waves in excess of 20 ft.

Sneaker waves — large waves that can suddenly appear without notice — could also appear, according to the advisory. Steeper and west-facing beaches could also experience large breaking waves.

Area beaches should experience rip currents along with localized beach erosion, the agency said.

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