591
WHGM70 PGUM 112319
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
919 AM CHST SUN APR 12 2026
PMZ151>154-121330-
/O.CON.PGUM.SC.Y.0036.000000T0000Z-260412T2000Z/
/O.CON.PGUM.TY.A.4004.000000T0000Z-000000T0000Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS-
SAIPAN COASTAL WATERS-
919 AM CHST SUN APR 12 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM CHST
MONDAY...
..TYPHOON WATCH REMAINS IN EFFECT
* WHAT...TYPHOON WATCH. FOR THE SMALL CRAFT ADVISORY, NORTHEAST
WINDS 20 TO 30 KT AND SEAS 10 TO 14 FEET.
* WHERE...MARIANAS COASTAL WATERS.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 6 AM CHST MONDAY.
FOR THE TYPHOON WATCH, STARTING ON OR AFTER 6 AM CHST MONDAY.
* IMPACTS...TYPHOON CONDITIONS, INCLUDING WINDS OF 64 KNOTS OR
MORE, ARE POSSIBLE WITHIN THE NEXT 48 HOURS. FOR THE SMALL CRAFT
ADVISORY, CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
* ADDITIONAL DETAILS...LATEST GUIDANCE INDICATES TROPICAL STORM
FORCE WINDS OF 34 TO 63 KNOTS ARE POSSIBLE AS EARLY AS MONDAY
MORNING. TYPHOON SINLAKU (04W) CONTINUES TO STRENGTHEN AS IT
MOVES SLOWLY NORTH-NORTHEAST IN CHUUK STATE, WITH ITS TRACK
STILL EXPECTED TO SHIFT BACK TO THE NORTHWEST AND TOWARDS THE
MARIANAS OVER THE NEXT FEW DAYS. SINLAKU MAY NEAR THE MARIANAS
AS A CATEGORY 3 OR 4 TYPHOON TUESDAY. NEAR THE CENTER OF
SINLAKU, SEAS COULD BUILD UP TO 40 FEET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
DECOU
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