544
WHGM70 PGUM 011657
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
257 AM CHST FRI OCT 2 2026
PMZ151-152-020700-
/O.CON.PGUM.SC.Y.0069.000000T0000Z-261001T1900Z/
/O.CON.PGUM.GL.W.0003.261001T1900Z-261003T0700Z/
/O.CON.PGUM.SE.A.0002.261003T0700Z-261004T0700Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-
257 AM CHST FRI OCT 2 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 AM CHST EARLY
THIS MORNING...
..GALE WARNING REMAINS IN EFFECT UNTIL 5 PM CHST SATURDAY
...HAZARDOUS SEAS WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH SUNDAY AFTERNOON...
* WHAT...FOR THE GALE WARNING, SOUTHWEST WINDS 25 TO 35 KT WITH
FREQUENT GUSTS UP TO 45 KT AND SEAS 12 TO 17 FEET EXPECTED. FOR
THE SMALL CRAFT ADVISORY, WEST WINDS 25 TO 30 KT WITH GUSTS UP
TO 40 KT AND SEAS 12 TO 14 FEET. FOR THE HAZARDOUS SEAS WATCH,
VERY STEEP AND HAZARDOUS SEAS 12 TO 16 FEET POSSIBLE.
* WHERE...GUAM COASTAL WATERS AND ROTA COASTAL WATERS.
* WHEN...FOR THE GALE WARNING, FROM 5 AM FRIDAY TO 5 PM CHST
SATURDAY. FOR THE SMALL CRAFT ADVISORY, UNTIL 5 AM CHST FRIDAY.
FOR THE HAZARDOUS SEAS WATCH, FROM SATURDAY AFTERNOON THROUGH
SUNDAY AFTERNOON.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS SEAS WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
* ADDITIONAL DETAILS...COMBINED SEAS OF 9 TO 12 FEET WILL RAPIDLY
INCREASE TODAY, PEAKING TO AROUND 17 FT OVER THE WEEKEND. WEST
TO SOUTHWEST WINDS WILL BE STRONG TO GALE-FORCE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.
PMZ153-154-020700-
/O.CON.PGUM.TR.W.4026.000000T0000Z-000000T0000Z/
TINIAN COASTAL WATERS-SAIPAN COASTAL WATERS-
257 AM CHST FRI OCT 2 2026
..TROPICAL STORM WARNING REMAINS IN EFFECT
* WHAT...SOUTHWEST WINDS 25 TO 40 KT WITH GUSTS TO 55 KT AND SEAS
14 TO 20 FEET.
* WHERE...TINIAN AND SAIPAN COASTAL WATERS.
* WHEN...UNTIL FURTHER NOTICE.
* IMPACTS...VERY STRONG WINDS WILL CAUSE HAZARDOUS SEAS WHICH
COULD CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
* ADDITIONAL DETAILS...TROPICAL STORM CHOI-WAN (26W) CONTINUES TO
DEVELOP AS IT MOVES WESTWARD ACROSS THE NORTHERN MARIANAS SOUTH
OF ALAMAGAN, WITH TROPICAL STORM FORCE WINDS ALREADY BEING FELT
OVER SAIPAN EARLY THIS MORNING. HAZARDOUS SEAS WILL CONTINUE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TROPICAL STORM WARNING MEANS SUSTAINED WINDS OF 34 TO 63 KT ARE
EXPECTED DUE TO A TROPICAL STORM WITHIN 36 HOURS.
DECOU
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