589  
WHGM70 PGUM 041735  
MWWGUM  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE TIYAN GU  
335 AM CHST WED AUG 5 2026  
 
PMZ151>154-050800-  
/O.CON.PGUM.SC.Y.0055.000000T0000Z-260806T2000Z/  
GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS-  
SAIPAN COASTAL WATERS-  
335 AM CHST WED AUG 5 2026  
   
..SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM CHST FRIDAY
 
 
* WHAT...SOUTHWEST TO WEST WINDS 15 TO 25 KT AND SEAS 8 TO 11 FEET  
EXPECTED.  
 
* WHERE...MARIANAS COASTAL WATERS.  
 
* WHEN...UNTIL 6 AM CHST FRIDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
* ADDITIONAL DETAILS...FRESH TO STRONG WESTERLIES WILL PREVAIL ACROSS  
THE MARIANAS TODAY, AS A WESTERLY MONSOON SURGE CONTINUES. COMBINED  
SEAS OF 8 TO 11 FEET ARE EXPECTED TODAY, TO THEN DROP A FOOT AND  
PERSIST AS SUCH FOR SEVERAL MORE DAYS, REMAINING HAZARDOUS TO SMALL  
CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER VESSELS,  
SHOULD AVOID BOATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
MONTVILA  
 
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