748
WHMY40 PGUM 160512
CFWGUM
URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
312 PM CHST FRI OCT 16 2026
GUZ001-MPZ001>003-161300-
/O.NEW.PGUM.SU.W.0009.261017T0700Z-261018T1800Z/
/O.NEW.PGUM.CF.A.0006.261017T0700Z-261018T1800Z/
GUAM-ROTA-TINIAN-SAIPAN-
312 PM CHST FRI OCT 16 2026
...HIGH SURF WARNING IN EFFECT FROM 5 PM SATURDAY TO 4 AM CHST
MONDAY...
...COASTAL FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH
LATE SUNDAY NIGHT...
* WHAT...FOR THE HIGH SURF WARNING, DANGEROUSLY LARGE BREAKING WAVES
OF 7 TO 9 FEET SATURDAY AFTERNOON, BUILDING TO AS HIGH AS 26 FEET
FOR GUAM, 20 FEET FOR ROTA AND 19 FEET FOR TINIAN AND SAIPAN. FOR
THE COASTAL FLOOD WATCH, SIGNIFICANT COASTAL FLOODING POSSIBLE.
* WHERE...FOR THE HIGH SURF WARNING, INITIALLY EAST FACING REEFS OF
GUAM, ROTA, TINIAN AND SAIPAN; SPREADING TO SOUTH FACING REEFS
THROUGH SUNDAY AFTERNOON. FOR THE COASTAL FLOOD WATCH, ALL REEFS
OF THE MARIANAS.
* WHEN...FOR THE HIGH SURF WARNING, FROM 5 PM SATURDAY TO 4 AM
CHST MONDAY. FOR THE COASTAL FLOOD WATCH, FROM SATURDAY AFTERNOON
THROUGH LATE SUNDAY NIGHT.
* IMPACTS...NUMEROUS ROADS MAY BE CLOSED. LOW LYING PROPERTY
INCLUDING HOMES, BUSINESSES, AND SOME CRITICAL INFRASTRUCTURE MAY
BE INUNDATED. SOME SHORELINE EROSION MAY 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. COASTAL INUNDATION OF UP TO 5 FEET FOR GUAM, 2 TO 4
FEET FOR ROTA AND 1 TO 3 FEET FOR TINIAN AND SAIPAN IS POSSIBLE.
COASTAL FLOODING AND BEACH EROSION IS POSSIBLE.
* ADDITIONAL DETAILS...AS TS CHAMPI APPROACHES THE MARIANAS, SURF
CONDITIONS ARE EXPECTED TO DETERIORATE RAPIDLY, WITH SURF REACHING
9 FEET SATURDAY AFTERNOON, BUILDING TO DANGEROUS/DEADLY LEVELS
THROUGH SATURDAY NIGHT.
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.
KLEESCHULTE
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