412
WHUS46 KMTR 201027
CFWMTR
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
227 AM PST FRI DEC 20 2024
CAZ006-505-509-529-530-210600-
/O.CON.KMTR.SU.Y.0012.241221T1400Z-241223T0000Z/
SAN FRANCISCO-
COASTAL NORTH BAY INCLUDING POINT REYES NATIONAL SEASHORE-
SAN FRANCISCO PENINSULA COAST-NORTHERN MONTEREY BAY-
SOUTHERN MONTEREY BAY AND BIG SUR COAST-
227 AM PST FRI DEC 20 2024
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 6 AM SATURDAY TO
4 PM PST SUNDAY...
* WHAT...EXPECT LARGE WESTERLY SWELL WITH BREAKING WAVES 15 TO 18
FEET, INCLUDING BREAKERS NEAR 20 FEET POSSIBLE ALONG FAVORED
WEST FACING BEACHES.
* WHERE...SAN FRANCISCO, COASTAL NORTH BAY INCLUDING POINT REYES
NATIONAL SEASHORE, SAN FRANCISCO PENINSULA COAST, NORTHERN
MONTEREY BAY AND SOUTHERN MONTEREY BAY AND BIG SUR COAST.
* WHEN...FROM 6 AM SATURDAY TO 4 PM PST SUNDAY.
* IMPACTS...DANGEROUS SWIMMING AND SURFING CONDITIONS AND
LOCALIZED BEACH EROSION. LARGE WAVES CAN SWEEP ACROSS THE
BEACH WITHOUT WARNING, PULLING PEOPLE INTO THE SEA FROM ROCKS,
JETTIES AND BEACHES. SUDDEN IMMERSION IN COLD WATER CAN RESULT
IN COLD WATER SHOCK EVEN FOR THE MOST EXPERIENCED SWIMMERS.
COLD WATER SHOCK CAN RESULT IN DRAMATIC CHANGES IN BREATHING,
HEART RATE AND BLOOD PRESSURE, GREATLY INCREASING THE RISK OF
DROWNING IN ROUGH OPEN WATERS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO
DANGEROUS SURF CONDITIONS.
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