086
WHMY40 PGUM 180200
CFWGUM
URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
1200 PM CHST SUN OCT 18 2026
MPZ002-003-181600-
/O.CAN.PGUM.CF.W.0003.000000T0000Z-261018T1800Z/
/O.CAN.PGUM.SU.W.0009.000000T0000Z-261018T1800Z/
/O.NEW.PGUM.SU.Y.0058.261018T0200Z-261018T1800Z/
/O.NEW.PGUM.RP.S.0023.261018T0200Z-261018T1800Z/
TINIAN-SAIPAN-
1200 PM CHST SUN OCT 18 2026
..HIGH SURF ADVISORY IN EFFECT UNTIL 4 AM CHST MONDAY
..HIGH RIP CURRENT RISK IN EFFECT THROUGH LATE TONIGHT
...COASTAL FLOOD WARNING IS CANCELLED...
..HIGH SURF WARNING IS CANCELLED
* WHAT...FOR THE HIGH SURF ADVISORY, LARGE BREAKING WAVES OF 10 TO 14
FEET IN THE SURF ZONE. FOR THE HIGH RIP CURRENT RISK, DANGEROUS RIP
CURRENTS.
* WHERE...EAST AND SOUTH FACING REEFS OF TINIAN AND SAIPAN.
* WHEN...UNTIL 4 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...AS SUPER TYPHOON CHAMPI CONTINUES MOVING AWAY
FROM THE MARIANAS, SWELLS FROM THE SOUTHEAST HAVE DIMINISHED ENOUGH
FOR SURF TO DROP BELOW 15 FT AND FOR COASTAL INUNDATION TO NO
LONGER BE A CONCERN. HOWEVER, ELEVATED SURF AND DANGEROUS RIP
CURRENTS WILL CONTINUE ALONG EAST AND SOUTH FACING REEFS THROUGH
TONIGHT.
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.
GUZ001-MPZ001-181600-
/O.CON.PGUM.CF.W.0003.000000T0000Z-261018T1800Z/
/O.CON.PGUM.SU.W.0009.000000T0000Z-261018T1800Z/
GUAM-ROTA-
1200 PM CHST SUN OCT 18 2026
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 4 AM CHST
MONDAY...
..HIGH SURF WARNING REMAINS IN EFFECT UNTIL 4 AM CHST MONDAY
* WHAT...FOR THE COASTAL FLOOD WARNING, SIGNIFICANT COASTAL FLOODING.
FOR THE HIGH SURF WARNING, DANGEROUSLY LARGE BREAKING WAVES OF 18
TO 24 FEET IN THE SURF ZONE.
* WHERE...GUAM AND ROTA.
* WHEN...UNTIL 4 AM CHST MONDAY.
* IMPACTS...LOW LYING PROPERTY INCLUDING HOMES, BUSINESSES, AND SOME
CRITICAL INFRASTRUCTURE MAY STILL BE INUNDATED. SOME SHORELINE
EROSION WILL OCCUR. BREAKING WAVES CAN SWEEP PEOPLE OFF JETTIES AND
DOCKS, AND INTO DANGEROUS SEAS. LIFE-THREATENING SWIMMING
CONDITIONS AND SIGNIFICANT BEACH EROSION CAN BE EXPECTED.
* ADDITIONAL DETAILS...SOUTH TO SOUTHEAST SWELLS AND ELEVATED WIND
WAVES INDUCED BY SUPER TYPHOON CHAMPI TO THE WEST-SOUTHWEST WILL
CONTINUE LIFE-THREATENING SURF AND SIGNIFICANT COASTAL FLOODING AT
LEAST THROUGH EARLY MONDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EVERYONE SHOULD REMAIN OUT OF THE WATER DUE TO LIFE-THREATENING
SURF CONDITIONS. STAY OFF OF JETTIES, PIERS, AND OTHER WATERSIDE
INFRASTRUCTURE.
MESA
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