938
WHGM70 PGUM 170537
MWWGUM
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE TIYAN GU
337 PM CHST SAT OCT 17 2026
PMZ151-152-171300-
/O.CON.PGUM.TY.W.4029.000000T0000Z-000000T0000Z/
GUAM COASTAL WATERS-ROTA COASTAL WATERS-
337 PM CHST SAT OCT 17 2026
..TYPHOON WARNING REMAINS IN EFFECT
* WHAT...TYPHOON CONDITIONS, INCLUDING WINDS OF 64 KNOTS OR MORE
ARE EXPECTED.
* WHERE...GUAM AND ROTA COASTAL WATERS.
* WHEN...ONSET OF DAMAGING WINDS BEGINNING TONIGHT. ONSET OF
DESTRUCTIVE WINDS AFTER MIDNIGHT WITH TYPHOON FORCE WINDS EARLY
SUNDAY MORNING. DAMAGING WINDS WILL CONTINUE INTO AT LEAST SUNDAY
NIGHT, IF CHAMPI SLOWS DOWN.
* IMPACTS...DESTRUCTIVE TO TYPHOON FORCE WINDS WILL PRODUCE DANGEROUS
TO DEADLY SEAS THAT COULD DAMAGE, CAPSIZE OR SINK VESSELS, ALONG
WITH DRASTICALLY REDUCING VISIBILITIES IN HEAVY RAIN.
* ADDITIONAL DETAILS...TYPHOON 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 NEAR THE SOUTHERN TIP OF GUAM, WITH DAMAGING WINDS MOVING IN
LATE TONIGHT AND LASTING INTO AT LEAST SUNDAY NIGHT. CHAMPI IS
EXPECTED TO STRENGTHEN FURTHER TODAY AS IT APPROACHES, THEN MOVE
THROUGH THE REGION AS A CATEGORY 3 TYPHOON SUNDAY MORNING. SEAS
ARE QUICKLY RISING, WITH SIGNIFICANT SEA HEIGHTS REACHING AS HIGH
AS 35 FEET NEAR THE EYE WALL OF CHAMPI. DANGEROUS SEA CONDITIONS
MAY CONTINUE INTO MONDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PREPARE FOR THE PASSAGE OF A CATEGORY 3 OR 4 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 TYPHOON CHAMPI APPROACHES, STAY IN SAFE HARBOR.
PMZ153-154-171300-
/O.CON.PGUM.TR.W.4029.000000T0000Z-000000T0000Z/
/O.CON.PGUM.TY.A.4029.000000T0000Z-000000T0000Z/
TINIAN COASTAL WATERS-SAIPAN COASTAL WATERS-
337 PM CHST SAT OCT 17 2026
..TROPICAL STORM WARNING REMAINS 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.
* WHERE...TINIAN AND SAIPAN COASTAL WATERS.
* WHEN...ONSET OF DAMAGING WINDS BEGINNING LATE TONIGHT, 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...TYPHOON 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 NEAR THE SOUTHERN TIP OF GUAM, WITH DAMAGING WINDS MOVING
INTO TINIAN AND SAIPAN TONIGHT AND LASTING INTO AT LEAST SUNDAY
EVENING. CHAMPI IS EXPECTED TO STRENGTHEN FURTHER TODAY AS IT
APPROACHES, THEN MOVE THROUGH THE REGION AS A CATEGORY 3 TYPHOON
SUNDAY MORNING. SEAS ARE QUICKLY RISING, 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 TONIGHT. SECURE ALL
VESSELS. CONDITIONS ARE EXPECTED TO BE CATASTROPHIC FOR SMALL CRAFT,
AND EXTREMELY DANGEROUS FOR ANY VESSELS OF LARGER SIZE. AS TYPHOON
CHAMPI APPROACHES THE MARIANAS, STAY IN SAFE HARBOR.
KLEESCHULTE
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