ABPW10 PGTW 280600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS 280600Z-290600ZDEC2025//
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) AN AREA OF CONVECTION (INVEST 99P) HAS PERSISTED NEAR 13.4S 
170.9W, APPROXIMATELY 55.6 NM NORTH-NORTHWEST OF PAGO PAGO. ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY DEPICTS A BROAD AREA OF TURNING OBSCURED 
BY SPOTTY FLARING CONVECTION. A 280421 ASCAT (METOP-B) SHOWS OVERALL 
BROAD ROTATION WITH 15- TO 20-KNOT ASSOCIATED SURFACE WINDS. 
ENVIRONMENTAL ANALYSIS REVEALS A MARGINALLY FAVORABLE ENVIRONMENT FOR 
DEVELOPMENT WITH MODERATE VERTICAL WIND SHEAR (15 TO 20 KTS), WARM SEA 
SURFACE TEMPERATURES (29-30 C), AND MODERATE DIVERGENCE ALOFT. ENSEMBLES 
AND DETERMINISTIC MODELS AGREE THAT INVEST 99P WILL CONTINUE TO DEVELOP 
AS IT TRACKS EASTWARD OVER THE NEXT 24-48 HOURS. MAXIMUM SUSTAINED 
SURFACE WINDS ARE ESTIMATED AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL 
PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE 
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS 
IS LOW.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
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