High Surf Advisory issued December 24 at 2:04AM PST until December 24 at 1:00PM PST by NWS Seattle WA

* WHAT…For the first High Surf Advisory, large breaking waves
of 16 to 20 feet in the surf zone. For the second High Surf
Advisory, large breaking waves of 18 to 24 feet expected in
the surf zone.

* WHERE…North Coast and Central Coast zones.

* WHEN…For the first High Surf Advisory, until 1 PM PST this
afternoon. For the second High Surf Advisory, from 10 PM
Wednesday to 10 PM PST Thursday.

* IMPACTS…Large waves may wash over beaches, jetties, and
other structures unexpectedly. Localized beach erosion is
possible. People can be swept off rocks and jetties, and drown
while observing high surf.

* ADDITIONAL DETAILS…Waves just offshore will be long period
with a dominant period of 20 to 22 seconds for both advisories.
This will enhance the risk for beach erosion and infrastructure
damage on west or southwest facing beaches.