803
WHGM70 PGUM 011621
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
221 AM CHST SUN AUG 2 2026
PMZ151-020800-
/O.CON.PGUM.SC.Y.0055.260801T2000Z-260806T2000Z/
GUAM COASTAL WATERS-
221 AM CHST SUN AUG 2 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING
TO 6 AM CHST FRIDAY...
* WHAT...WEST WINDS 15 TO 25 KT AND SEAS 8 TO 13 FEET EXPECTED.
GUSTS TO 35 KT POSSIBLE.
* WHERE...GUAM COASTAL WATERS.
* WHEN...FROM 6 AM THIS MORNING TO 6 AM CHST FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
* ADDITIONAL DETAILS...FRESH TO STRONG WESTERLIES WILL PREVAIL
ACROSS THE MARIANAS THE NEXT FEW DAYS BEGINNING WITH GUAM COASTAL
WATERS, GENERATING CHOPPY SEAS HAZARDOUS TO SMALL CRAFT, WHICH WILL
THEN SPREAD NORTHWARD ACROSS THE CNMI THROUGH BEFORE MIDWEEK.
WINDS WILL PEAK IN THE FIRST HALF OF THE WEEK, WITH A POSSIBILITY
OF FREQUENT GALE-FORCE GUSTS MONDAY AND TUESDAY, WHICH WOULD
NECESSITATE A GALE WARNING AT THAT TIME. ADDITIONALLY, DISTANT
TYPHOON DOLPHIN (12W) IS GENERATING A LONG-PERIOD EASTERLY SWELL
THAT IS MOVING THROUGH THE MARIANAS, WHICH WILL GRADUALLY SHIFT
NORTH OVER THE NEXT SEVERAL DAYS, TO THEN SHIFT TO THE NORTHWEST.
MEANWHILE, THE DEVELOPING MONSOON PATTERN WILL LEAD TO INCREASING
SOUTHWESTERLY SWELL OVER THE COMING DAYS. THESE INCREASING SWELLS
AND WIND WAVES WILL BUILD COMBINED SEAS TO EXCEED 10 FEET ACROSS
THE COASTAL WATERS, MAINTAINING HAZARDOUS SEA CONDITIONS FOR MUCH
OF THIS WEEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER VESSELS,
SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
MONTVILA
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