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Weather Alerts for San Mateo Coast

Issued by the National Weather Service

Beach Hazards Statement  BEACH HAZARDS STATEMENT   Beach Hazards Statement
SAN MATEO COAST

Areas Affected:
Coastal North Bay Including Point Reyes National Seashore - Northern Monterey Bay - San Francisco - San Francisco Peninsula Coast - Southern Monterey Bay and Big Sur Coast
Effective: Fri, 10/20 6:00pm Updated: Fri, 10/20 9:55pm Urgency: Expected
Expires: Sat, 10/21 9:00pm Severity:  Moderate  Certainty: Likely

 
Details:
...HIGH SURF ADVISORY EXPIRES AT 6 PM AND WILL BE REPLACED WITH A
BEACH HAZARDS STATEMENT THROUGH SATURDAY EVENING...
.A LARGE NORTHWEST SWELL OF 15 TO 18 FEET WITH PERIODS OF 15 TO
18 SECONDS PEAKED EARLIER TODAY AND WILL CONTINUE TO TAPER OFF
THROUGH THE OVERNIGHT HOURS. THIS SWELL WILL RESULT IN BREAKING
WAVES OF GENERALLY AROUND 12 TO 15 FEET, OCCASIONALLY REACHING UP
TO 20 FEET AT FAVORED LOCATIONS. THESE CONDITIONS WILL POSE A
THREAT TO BEACHGOERS AND MARINERS TRAVERSING HARBOR ENTRANCES
THROUGH SATURDAY EVENING.
...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH SATURDAY
EVENING...
...HIGH SURF ADVISORY WILL EXPIRE AT 6 PM PDT THIS EVENING...
* SEAS...A NORTHWESTERLY SWELL OF 12 TO 15 FT AT 15 TO 17 SECONDS
WILL CONTINUE TO CREATE HAZARDOUS BEACH CONDITIONS. BREAKING
WAVES MAY REACH UP TO 20 FEET AT FAVORED LOCATIONS.
* TIMING...THROUGH SATURDAY EVENING. WAVES ALREADY PEAKED EARLIER
FRIDAY AND WILL CONTINUE TO DIMINISH OVERNIGHT AND INTO
SATURDAY. WAVES OF GENERALLY AROUND 12 TO 15 FEET, OCCASIONALLY
REACHING UP TO 20 FEET AT FAVORED LOCATIONS.
* LOCATION...COASTLINE FROM SONOMA COUNTY SOUTH THROUGH MONTEREY
COUNTY. IN PARTICULAR WEST TO NORTHWEST FACING BEACHES...
INCLUDING BUT NOT LIMITED TO...OCEAN BEACH...MONTARA STATE
BEACH AND MARINA STATE BEACH.
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.
&&

Information:
A BEACH HAZARD STATEMENT MEANS THE POTENTIALLY DANGEROUS
CONDITIONS MAY EXIST ON SPECIFIC BEACHES. THESE HAZARDS MAY
INCLUDE LARGE SHORE BREAK...STRONG RIP CURRENTS...STRONG LONGSHORE
CURRENTS AND POSSIBLY SNEAKER WAVES. ALL OF WHICH COULD BE LIFE
THREATENING. BE SURE TO ALWAYS KEEP YOUR EYES ON THE OCEAN.

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