526
WHMY40 PGUM 180550
CFWGUM
URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
350 PM CHST THU DEC 18 2025
GUZ001-MPZ001>003-182000-
/O.EXT.PGUM.SU.Y.0043.000000T0000Z-251221T2000Z/
/O.EXT.PGUM.RP.S.0021.000000T0000Z-251221T2000Z/
GUAM-ROTA-TINIAN-SAIPAN-
350 PM CHST THU DEC 18 2025
..HIGH SURF ADVISORY NOW IN EFFECT UNTIL 6 AM CHST MONDAY
...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY
NIGHT...
* WHAT...FOR THE HIGH SURF ADVISORY, LARGE BREAKING WAVES OF 7 TO
9 FEET WILL BUILD TO 11 FEET AND DANGEROUS RIP CURRENTS.
* WHERE...NORTH FACING REEFS FOR THE SURF AND NORTH AND EAST
FACING REEFS FOR THE RIP CURRENTS OF THE MARIANAS.
* WHEN...THROUGH AT LEAST 6 AM CHST MONDAY.
* IMPACTS...DANGEROUS SWIMMING AND SURFING CONDITIONS AND
LOCALIZED BEACH EROSION. RIP CURRENTS CAN SWEEP EVEN THE BEST
SWIMMERS AWAY FROM SHORE INTO DEEPER WATER.
* ADDITIONAL DETAILS...A NORTHEAST SWELL WILL CONTINUE TO BUILD
OVER THE NEXT SEVERAL DAYS. MODEL GUIDANCE SHOWS SURF POSSIBLY
REACHING UP TO 12 FEET FOR NORTH FACING REEFS AND POSSIBLY
EAST FACING REEFS (DANGEROUS AND LIFE THREATENING RIP
CURRENTS) BEFORE THE SWELL BEGINS TO RELAX. THIS IS
ANTICIPATED TO BE A LONG TERM EVENT, AND WILL BE REFRESHED,
RE-EVALUATED AND EXTENDED AS NEEDED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RIP CURRENTS WILL BE LIFE THREATENING. INEXPERIENCED SWIMMERS
SHOULD REMAIN OUT OF THE WATER DUE TO DANGEROUS SURF CONDITIONS.
RIP CURRENTS WILL BE LIFE THREATENING. IF CAUGHT IN A RIP
CURRENT, RELAX AND FLOAT. DON'T SWIM AGAINST THE CURRENT. IF
ABLE, SWIM IN A DIRECTION FOLLOWING THE SHORELINE. IF UNABLE TO
ESCAPE, FACE THE SHORE AND CALL OR WAVE FOR HELP.
BOWSHER
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page