299
WHGM70 PGUM 180645
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
445 PM CHST SAT APR 18 2026
PMZ153-154-182045-
/O.EXP.PGUM.SE.W.0004.000000T0000Z-260418T0700Z/
/O.EXT.PGUM.SC.Y.0039.000000T0000Z-260419T0700Z/
TINIAN COASTAL WATERS-SAIPAN COASTAL WATERS-
445 PM CHST SAT APR 18 2026
..SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 PM CHST SUNDAY
...HAZARDOUS SEAS WARNING WILL EXPIRE AT 5 PM CHST THIS
AFTERNOON...
* WHAT...SEAS 10 TO 14 FEET.
* WHERE...TINIAN AND SAIPAN COASTAL WATERS.
* WHEN...UNTIL 5 PM CHST SUNDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
* ADDITIONAL DETAILS...ELEVATED, CHOPPY SEAS HAZARDOUS TO SMALL
CRAFT CONTINUE IN THE WAKE OF TYPHOON SINLAKU. LATEST BUOY AND
ALTIMETRY DATA INDICATE COMBINED SEAS OF 10 TO 14 FEET. SEAS
WILL BE SLOW TO SUBSIDE OVER THE NEXT FEW DAYS, AND THE SMALL
CRAFT ADVISORY HAS BEEN EXTENDED THROUGH SUNDAY AFTERNOON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
PMZ151-152-182045-
/O.EXT.PGUM.SC.Y.0039.000000T0000Z-260419T0700Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-
445 PM CHST SAT APR 18 2026
..SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 PM CHST SUNDAY
* WHAT...SEAS 9 TO 12 FEET.
* WHERE...GUAM AND ROTA COASTAL WATERS.
* WHEN...UNTIL 5 PM CHST SUNDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
* ADDITIONAL DETAILS...ELEVATED, CHOPPY SEAS HAZARDOUS TO SMALL
CRAFT CONTINUE IN THE WAKE OF TYPHOON SINLAKU. LATEST BUOY AND
ALTIMETRY DATA INDICATE COMBINED SEAS OF 9 TO 12 FEET. SEAS
WILL BE SLOW TO SUBSIDE OVER THE NEXT FEW DAYS, AND THE SMALL
CRAFT ADVISORY HAS BEEN EXTENDED THROUGH SUNDAY AFTERNOON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
DECOU
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