382
WHMY40 PGUM 041727
CFWGUM
URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
327 AM CHST SUN JUL 5 2026
GUZ001-MPZ001>003-050800-
/O.CON.PGUM.SU.Y.0046.000000T0000Z-260709T0600Z/
/O.CON.PGUM.CF.A.0004.000000T0000Z-260708T0600Z/
GUAM-ROTA-TINIAN-SAIPAN-
327 AM CHST SUN JUL 5 2026
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST THURSDAY
...COASTAL FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...
* WHAT...FOR THE HIGH SURF ADVISORY, LARGE BREAKING WAVES OF 25 TO 35
FEET IN THE SURF ZONE. FOR THE COASTAL FLOOD WATCH, SIGNIFICANT
COASTAL FLOODING.
* WHERE...GUAM, ROTA, TINIAN AND SAIPAN.
* WHEN...FOR THE HIGH SURF ADVISORY, UNTIL 4 PM CHST THURSDAY.
FOR THE COASTAL FLOOD WATCH, THROUGH WEDNESDAY AFTERNOON.
* IMPACTS...NUMEROUS ROADS MAY BE CLOSED. LOW LYING PROPERTY
INCLUDING HOMES, BUSINESSES, AND SOME CRITICAL INFRASTRUCTURE
WILL BE INUNDATED. SIGNIFICANT SHORELINE EROSION WILL OCCUR.
WATERS WILL BE DEADLY.
* ADDITIONAL DETAILS...SURF LEVELS ARE BUILDING TO HAZARDOUS LEVELS
ALONG NORTH AND EAST FACING REEFS AS SUPER TYPHOON BAVI APPROACHES
THE MARIANAS FROM THE EAST, AND WILL RAPIDLY BECOME DANGEROUS
ACROSS NORTH, EAST, AND SOUTH FACING REEFS INTO THIS EVENING AS
TROPICAL STORM FORCE CONDITIONS DEVELOP, SPREADING TO WEST FACING
REEFS SOON AFTER. SURF WILL POTENTIALLY BUILD TO 35 FEET MONDAY
MORNING NEAR ROTA AND 30 FEET ELSEWHERE AS BAVI MAKES PASSAGE
THROUGH THE ISLANDS AS A CATEGORY 5 SUPER TYPHOON. COASTAL
INUNDATION WILL BECOME LIKELY BEGINNING LATE THIS AFTERNOON,
POTENTIALLY SOONER IF THE SYSTEM BEGINS TO MOVE FASTER. DURING THE
PASSAGE OF BAVI, COASTAL INUNDATION COULD APPROACH 12 FEET,
ESPECIALLY NEAR THE STORM CENTER DUE TO THE DOME EFFECT. ONCE BAVI
EXITS TO THE WEST-NORTHWEST BY TUESDAY, COASTAL INUNDATION AND
EROSION IS LIKELY TO INCREASE ALONG WEST FACING SHORES WHILE EASING
ELSEWHERE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO DANGEROUS
SURF CONDITIONS.
MONTVILA
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