088
WHGM70 PGUM 040703
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
503 PM CHST TUE AUG 4 2026
PMZ151>154-042115-
/O.CON.PGUM.SC.Y.0055.000000T0000Z-260806T2000Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS-
SAIPAN COASTAL WATERS-
503 PM CHST TUE AUG 4 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM CHST
FRIDAY...
* WHAT...WEST WINDS 20 TO 30 KT WITH GUSTS TO 40 KT AND SEAS 8 TO
11 FEET EXPECTED.
* WHERE...MARIANAS COASTAL WATERS.
* WHEN...UNTIL 6 AM CHST FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
* ADDITIONAL DETAILS...FRESH TO STRONG WESTERLIES WITH NEAR-GALE
TO OCCASIONALLY GALE FORCE GUSTS WILL PREVAIL ACROSS THE MARIANAS
THROUGH AT LEAST EARLY WEDNESDAY, AS A WESTERLY MONSOON SURGE
CONTINUES. ADDITIONALLY, DISTANT TYPHOON DOLPHIN (12W) IS
GENERATING A LONG-PERIOD NORTH SWELL THAT IS MOVING THROUGH THE
MARIANAS, WHICH WILL CONTINUE TO SHIFT TO THE NORTHWEST, IN
ADDITION TO WEST TO SOUTHWEST SWELLS INCREASING OVER THE COMING
DAYS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
WILLIAMS
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