ABPW10 PGTW 300600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/300600Z-310600ZDEC2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/300153ZDEC2025//
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: NONE.
   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:
      (1) THE AREA OF CONVECTION (INVEST 99P) PREVIOUSLY LOCATED NEAR 
12.1S 168.2W IS NOW LOCATED NEAR 13.8S 167.5W, APPROXIMATELY 118 NM WEST 
OF MANUA ISLANDS. ANIMATED ENHANCED MULTISPECTRAL SATELLITE IMAGERY 
DEPICTS DEEP CONVECTION BUILDING OVER THE NORTHERN SEMICIRCLE OF A 
SLOWLY CONSOLIDATING AND VERY BROAD LOW LEVEL CIRCULATION CENTER (LLCC). 
ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES A FAVORABLE ENVIRONMENT 
WITH WARM SEA SURFACE TEMPERATURES (29-30 C), MINIMAL VERTICAL WIND 
SHEAR (LESS THAN 10 KTS), AND ROBUST POLEWARD OUTFLOW ALOFT. GLOBAL 
DETERMINISTIC AND ENSEMBLE MODELS ARE IN GOOD AGREEMENT THAT 99P WILL 
DEVELOP RAPIDLY OVER THE NEXT 24 HOURS WITH THE GFS AND GEFS SHOWING A 
FASTER DEVELOPMENT. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 23 
TO 28 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 997 MB. 
THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE 
WITHIN THE NEXT 24 HOURS REMAINS HIGH. SEE REF A (WTPS21 PGTW 300200) 
FOR FURTHER DETAILS.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
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