967
WHMY40 PGUM 172155 AAA
CFWGUM
URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE...UPDATED
NATIONAL WEATHER SERVICE TIYAN GU
755 AM CHST SUN OCT 18 2026
GUZ001-MPZ001>003-181300-
/O.CON.PGUM.CF.W.0003.000000T0000Z-261018T1800Z/
/O.CON.PGUM.SU.W.0009.000000T0000Z-261018T1800Z/
GUAM-ROTA-TINIAN-SAIPAN-
755 AM 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 EXPECTED FOR SOUTH AND EAST FACING SHORELINES. FOR THE
HIGH SURF WARNING, DANGEROUSLY LARGE BREAKING WAVES UP TO 30 FEET
FOR GUAM, 20 TO 25 FEET FOR ROTA, AND 15 TO 20 FEET FOR TINIAN AND
SAIPAN.
* WHERE...SOUTH AND EAST FACING REEFS OF GUAM, ROTA, TINIAN AND
SAIPAN.
* WHEN...FROM 5 PM THIS AFTERNOON TO 4 AM CHST MONDAY.
* IMPACTS...NUMEROUS ROADS MAY BE CLOSED. LOW-LYING PROPERTY
INCLUDING HOMES, BUSINESSES, AND SOME CRITICAL INFRASTRUCTURE WILL
BE INUNDATED. SHORELINE EROSION WILL OCCUR. BREAKING WAVES CAN
SWEEP PEOPLE OFF THEIR FEET, AND INTO DANGEROUS SEAS. LIFE-
THREATENING SWIMMING CONDITIONS AND SIGNIFICANT BEACH EROSION CAN
BE EXPECTED. COASTAL INUNDATION OF 5 TO 7 FEET FOR GUAM, 2 TO 4
FEET FOR ROTA AND 2 TO 4 FEET FOR TINIAN AND SAIPAN IS POSSIBLE
ALONG WITH COASTAL FLOODING AND BEACH EROSION.
* ADDITIONAL DETAILS...DANGEROUS SURF FROM THE SOUTHEAST WILL
CONTINUE THE NEXT DAY OR SO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EVERYONE SHOULD REMAIN OUT OF THE WATER DUE TO LIFE-THREATENING
SURF CONDITIONS. STAY WELL AWAY FROM THE COAST.
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