905
WHGM70 PGUM 160651
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
451 PM CHST FRI OCT 16 2026
PMZ151-152-162100-
/O.UPG.PGUM.TY.A.4029.000000T0000Z-000000T0000Z/
/O.NEW.PGUM.TY.W.4029.261016T0651Z-000000T0000Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-
451 PM CHST FRI OCT 16 2026
..TYPHOON WARNING IN EFFECT
* WHAT....TYPHOON CONDITIONS, INCLUDING WINDS OF 64 KNOTS OR MORE
ARE EXPECTED.
* WHERE...GUAM COASTAL WATERS AND ROTA COASTAL WATERS.
* WHEN...ONSET OF DAMAGING WINDS BEGINNING SATURDAY NIGHT. ONSET
OF DESTRUCTIVE WINDS SUNDAY MORNING. DAMAGING WINDS WILL
CONTINUE INTO AT LEAST SUNDAY NIGHT, POSSIBLY LONGER IF
CONDITIONS WARRANT.
* IMPACTS...DESTRUCTIVE WINDS WILL PRODUCE DANGEROUS SEAS THAT
COULD DAMAGE, CAPSIZE OR SINK VESSELS, ALONG WITH DRASTICALLY
REDUCING VISIBILITIES IN HEAVY RAIN.
* ADDITIONAL DETAILS...TROPICAL STORM CHAMPI (29W) CONTINUES TO
MOVE QUICKLY TOWARD THE MARIANAS. THE EXACT PATH OF 29W REMAINS
SUBJECT TO CHANGE. HOWEVER, GUIDANCE SUPPORTS A PASSAGE THROUGH
GUAM COASTAL WATERS, WITH DAMAGING WINDS MOVING IN SATURDAY
NIGHT AND LASTING INTO AT LEAST SUNDAY NIGHT. CHAMPI IS EXPECTED
TO STRENGTHEN FURTHER TODAY AND SATURDAY AS IT APPROACHES, THEN
MOVE THROUGH THE REGION AS A TYPHOON SUNDAY MORNING. SEAS WILL
QUICKLY RISE, WITH SIGNIFICANT SEA HEIGHTS REACHING AS HIGH AS
35 FEET DURING CLOSEST PASSAGE OF CHAMPI. DANGEROUS SEA
CONDITIONS MAY CONTINUE INTO MONDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...PREPARE FOR THE PASSAGE OF A
TYPHOON SUNDAY MORNING. SECURE ALL VESSELS. CONDITIONS ARE
EXPECTED TO BE CATASTROPHIC FOR SMALL CRAFT, AND EXTREMELY
DANGEROUS FOR ANY VESSELS OF LARGER SIZE. AS TROPICAL STORM CHAMPI
APPROACHES, STAY IN SAFE HARBOR.
PMZ153-154-162100-
/O.NEW.PGUM.TR.W.4029.261016T0651Z-000000T0000Z/
/O.CON.PGUM.TY.A.4029.000000T0000Z-000000T0000Z/
TINIAN COASTAL WATERS-SAIPAN COASTAL WATERS-
451 PM CHST FRI OCT 16 2026
..TROPICAL STORM WARNING IN EFFECT
..TYPHOON WATCH REMAINS IN EFFECT
* WHAT...TROPICAL STORM CONDITIONS, INCLUDING WINDS OF 34 TO 63
KNOTS, ARE EXPECTED. TYPHOON CONDITIONS, INCLUDING WINDS OF 64
KNOTS OR MORE ARE POSSIBLE WITHIN THE NEXT 48 HOURS.
* WHERE...TINIAN AND SAIPAN COASTAL WATERS.
* WHEN...ONSET OF DAMAGING WINDS BEGINNING SATURDAY NIGHT,
CONTINUING INTO AT LEAST SUNDAY NIGHT, POSSIBLY LONGER IF
CONDITIONS WARRANT.
* IMPACTS...DESTRUCTIVE WINDS WILL PRODUCE DANGEROUS SEAS THAT
COULD DAMAGE, CAPSIZE OR SINK VESSELS, ALONG WITH DRASTICALLY
REDUCING VISIBILITIES IN HEAVY RAIN.
* ADDITIONAL DETAILS...TROPICAL STORM CHAMPI (29W) CONTINUES TO
MOVE QUICKLY TOWARD THE MARIANAS. THE EXACT PATH OF 29W REMAINS
SUBJECT TO CHANGE. HOWEVER, GUIDANCE SUPPORTS A PASSAGE THROUGH
GUAM COASTAL WATERS, WITH DAMAGING WINDS MOVING INTO TINIAN AND
SAIPAN SATURDAY NIGHT AND LASTING INTO AT LEAST SUNDAY NIGHT.
CHAMPI IS EXPECTED TO STRENGTHEN FURTHER TODAY AND SATURDAY AS
IT APPROACHES, THEN MOVE THROUGH THE REGION AS A TYPHOON SUNDAY
MORNING. SEAS WILL QUICKLY RISE, WITH SIGNIFICANT SEA HEIGHTS
REACHING AS HIGH AS 25 FEET DURING CLOSEST PASSAGE OF CHAMPI.
DANGEROUS SEA CONDITIONS MAY CONTINUE INTO MONDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...PREPARE FOR TROPICAL STORM
FORCE CONDITIONS SUNDAY MORNING. SECURE ALL VESSELS. CONDITIONS
ARE EXPECTED TO BE CATASTROPHIC FOR SMALL CRAFT, AND EXTREMELY
DANGEROUS FOR ANY VESSELS OF LARGER SIZE. AS TROPICAL STORM CHAMPI
APPROACHES THE MARIANAS, STAY IN SAFE HARBOR.
DECOU
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