ABPW10 PGTW 280600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/280600Z-290600ZAUG2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PERAL HARBOR HI//280321ZAUG2025//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 93W) PREVIOUSLY LOCATED NEAR 
14.5N 116.1E IS NOW LOCATED NEAR 14.9N 115.9E, APPROXIMATELY 449 NM 
EAST OF DA NANG, VIETNAM. BASED ON RECENT SATELLITE IMAGERY AND ASCAT 
DATA, THE SYSTEM HAS QUICKLY TRANSITIONED FROM A MONSOON DEPRESSION TO 
A TROPICAL DEPRESSION. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) 
AND A 272318Z SSMIS 37GHZ MICROWAVE IMAGE DEPICT IMPROVED CONVECTIVE 
BANDING OVER THE WESTERN SEMICIRCLE WRAPPING INTO THE CONSOLIDATING LOW 
LEVEL CIRCULATION. MSI ALSO SHOWS A BROAD, EXPOSED CENTER, WITH 
MULTIPLE MESOVORTICIES ROTATING CYCLONICALLY AROUND A CENTROID. A 
280059Z ASCAT-B IMAGE REVEALS A BROAD CENTER, WITH 25-30 KNOT WINDS 
DISPLACED ABOUT 70-75NM TO THE SOUTH, WHICH IS MORE TYPICAL OF TROPICAL 
SYSTEMS. ENVIRONMENT ANALYSIS REVEALS MARGINALLY FAVORABLE CONDITIONS 
WITH MODERATE TO HIGH VERTICAL WIND SHEAR 20-25 KNOTS OFFSET BY ROBUST 
WESTWARD OUTFLOW ALOFT AND WARM 28-29 C SEA SURFACE TEMPERATURES (SST). 
GLOBAL MODELS ARE SHOWING STEADY DEVELOPMENT WITH A NORTHWESTWARD TRACK 
OVER THE NEXT 24 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 
25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1002 
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE 
WITHIN THE NEXT 24 HOURS REMAINS HIGH. SEE REF A (WTPN21 PGTW 280330) 
FOR FURTHER DETAILS.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
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