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High Surf Advisory

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
346 PM PDT WED OCT 18 2017

...HIGH SURF EXPECTED THURSDAY NIGHT THROUGH FRIDAY...

.A LARGE NORTHWEST SWELL OF 15 TO 18 FEET WITH PERIODS OF 18 TO
20 SECONDS WILL ARRIVE THURSDAY NIGHT AND SPREAD THROUGH THE
COASTAL WATERS THROUGH FRIDAY. THIS SWELL WILL RESULT IN BREAKING
WAVES OF 13 TO 18 FEET, OCCASIONALLY UP TO 25 FEET AT FAVORED
BEACHES. THESE CONDITIONS WILL POSE A THREAT TO BEACHGOERS AND
MARINERS TRAVERSING HARBOR ENTRANCES LATE THIS WEEK.

CAZ006-505-509-529-530-191000-
/O.CON.KMTR.SU.Y.0007.171020T0100Z-171021T0100Z/
SAN FRANCISCO-
COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE-
SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY-
SOUTHERN MONTEREY BAY AND BIG SUR COAST-
346 PM PDT WED OCT 18 2017

...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 6 PM THURSDAY TO
6 PM PDT FRIDAY...

* WAVES AND SURF...BREAKING WAVES OF 13 TO 18 FEET, OCCASIONALLY
  UP TO 25 FEET ALONG WEST AND NORTHWEST FACING BEACHES.

* TIMING...BEGINNING LATE THURSDAY THROUGH FRIDAY.

* IMPACTS...LARGE BREAKING WAVES ALONG THE COAST WILL LEAD TO
  INCREASED WAVE RUN-UP ON BEACHES WITH WAVES TOPPING AND
  WASHING OVER LARGE ROCKS AND JETTIES. THESE LARGE WAVES CAN BE
  ERRATIC AND UNPREDICTABLE. USE EXTRA CAUTION NEAR THE SURF
  ZONE AS THESE LARGE WAVES WILL BE CAPABLE OF SWEEPING PEOPLE
  INTO THE FRIGID AND TURBULENT OCEAN WATER. MARINERS TRAVERSING
  THE BAR OR HARBOR ENTRANCES ARE ALSO URGED TO EXERCISE EXTREME
  CAUTION...OR STAY IN PORT UNTIL THE THREAT SUBSIDES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN
THE ADVISORY AREA...PRODUCING RIP CURRENTS AND LOCALIZED BEACH
EROSION.

&&

$$




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Page last modified: May 16, 2007
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