484
WHGM70 PGUM 130531
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
331 PM CHST MON APR 13 2026
PMZ152>154-131945-
/O.CON.PGUM.TY.W.4004.000000T0000Z-000000T0000Z/
ROTA COASTAL WATERS-TINIAN COASTAL WATERS-SAIPAN COASTAL WATERS-
331 PM CHST MON APR 13 2026
..TYPHOON WARNING REMAINS IN EFFECT
* WHAT...TYPHOON WARNING. TROPICAL STORM FORCE WINDS OF 40 TO
60 KT ARE EXPECTED AS EARLY AS THIS EVENING, WITH TYPHOON FORCE
WINDS OF 64 KT OR GREATER LATE TUESDAY MORNING OR EARLY AFTERNOON
TUESDAY. SEAS ARE BUILDING TO 30 FEET OR MORE BY TUESDAY.
* WHERE...ROTA, TINIAN, AND SAIPAN COASTAL WATERS.
* WHEN...THROUGH AT LEAST WEDNESDAY EVENING.
* IMPACTS...CONDITIONS WILL BE CATASTROPHIC FOR SMALL CRAFT AND
EXTREMELY DANGEROUS FOR LARGE VESSELS. SEEK SAFE HARBOR AS SOON
AS POSSIBLE.
* ADDITIONAL DETAILS...TROPICAL STORM WINDS ARE EXPECTED TO MOVE
INTO THE WATERS THIS EVENING WITH TYPHOON WINDS LATE TUESDAY
MORNING OR EARLY TUESDAY AFTERNOON. THE PAST FEW FORECASTS HAVE
SHIFTED THE TRACK NORTHWARD, SO STRONGEST WINDS WILL LIKELY BE
AROUND TINIAN AND SAIPAN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TYPHOON WARNING MEANS SUSTAINED WINDS OF 64 KT OR 74 MPH OR
GREATER ARE EXPECTED.
PMZ151-131945-
/O.CON.PGUM.TR.W.4004.000000T0000Z-000000T0000Z/
/O.CON.PGUM.TY.A.4004.000000T0000Z-000000T0000Z/
GUAM COASTAL WATERS-
331 PM CHST MON APR 13 2026
..TROPICAL STORM WARNING REMAINS IN EFFECT
..TYPHOON WATCH REMAINS IN EFFECT
* WHAT...FOR THE TROPICAL STORM WARNING, NORTH WINDS 45 KT WITH
GUSTS TO 65 KT AND SHIFTING TO THE NORTHWEST AND THEN WEST. SEAS
15 TO 25 FEET. FOR THE TYPHOON WATCH, TYPHOON CONDITIONS
POSSIBLE.
* WHERE...GUAM COASTAL WATERS.
* WHEN...THROUGH AT LEAST WEDNESDAY AFTERNOON.
* IMPACTS...DAMAGING WINDS WILL CAUSE HAZARDOUS SEAS WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
* ADDITIONAL DETAILS...TROPICAL STORM WINDS ARE EXPECTED TO MOVE
INTO THE WATERS THIS EVENING. THE PAST FEW FORECASTS HAVE SHIFTED
THE TRACK NORTHWARD, SO STRONGEST WINDS WILL LIKELY BE AROUND
TINIAN AND SAIPAN, REDUCING THE RISK FOR TYPHOON CONDITIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TROPICAL STORM WARNING MEANS SUSTAINED WINDS OF 34 TO 63 KT OR
39 TO 73 MPH ARE EXPECTED.
KLEESCHULTE
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