ABPW10 PGTW 240600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/240600Z-250600ZAPR2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/240151ZAPR2021//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 24APR21 0000Z, SUBTROPICAL STORM 02W (SURIGAE) WAS 
LOCATED NEAR 23.0N 131.1E, APPROXIMATELY 570 NM WEST OF IWO TO, AND 
HAD TRACKED EAST-SOUTHEASTWARD AT 06 KNOTS OVER THE PAST SIX HOURS. 
MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 55 KNOTS GUSTING 
TO 70 KNOTS. SEE REF A (WTPN31 PGTW 240300) FOR FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   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: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 96P) PREVIOUSLY LOCATED 
NEAR 28.4S 142.2W IS NOW LOCATED NEAR 28.7S 142.4W, APPROXIMATELY 
768 NM SOUTHEAST OF PAPEETE, FRENCH POLYNESIA. THE SYSTEM IS 
CURRENTLY CLASSIFIED AS A SUBTROPICAL STORM, GENERALLY CHARACTERIZED 
AS HAVING BOTH TROPICAL AND MIDLATITUDE CYCLONE FEATURES. ANIMATED 
ENHANCED INFRARED SATELLITE IMAGERY AND ANIMATED WATER VAPOR LOOP 
INDICATES THE SYSTEM IS LOCATED DIRECTLY UNDER A BROAD UPPERLEVEL 
COLD CORE LOW. A 240234Z SSMIS 91GHZ IMAGE REVEALS FORMATIVE, SPIRAL 
BANDING WRAPPING INTO A LOW LEVEL CIRCULATION (LLC) WITH DEEP 
CONVECTION IN THE NORTHWEST AND SOUTHEAST PERIPHERIES. ENVIRONMENTAL
ANALYSIS FOR INVEST 96P INDICATES A HOSTILE ENVIRONMENT, NOT 
CONDUCIVE FOR TROPICAL DEVELOPMENT DUE TO CONVERGENCE ALOFT AND COOL 
(25-26 CELSIUS) SEA SURFACE TEMPERATURES. GLOBAL MODELS SHOW A 
GENERAL SOUTHWARD TRACK WITH MINIMAL INTENSIFICATION OVER THE NEXT 
24-36 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 30 TO 
35 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1006 
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL 
CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW.
      (2) NO OTHER SUSPECT AREAS.//
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