ABPW10 PGTW 220600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/220600Z-230600ZAUG2023//
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 90W) PREVIOUSLY LOCATED NEAR 
19.6N 153.3E IS NOW LOCATED NEAR 19.4N 153.1E, APPROXIMATELY 601 NM 
NORTHEAST OF GUAM. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A 
FULLY EXPOSED, TIGHTLY WRAPPED LOW LEVEL CIRCULATION (LLC) WITH FLARING 
CONVECTION OFFSET TO THE EAST. A 220249Z AMSR2 89GHZ MICROWAVE IMAGE 
REVEALS AN EXPOSED, DEFINED LLC WITH DEEP CONVECTION CONFINED TO THE 
EASTERN SEMICIRCLE. RECENT SCATTEROMETER DATA SHOWS A SWATH OF 20-25 
KNOTS OVER THE NORTH-EASTERN QUADRANT. THE SYSTEM IS LOCATED WITHIN A 
MARGINAL ENVIRONMENT DIRECTLY UNDER A DEEP UPPER-LEVEL TROUGH WITH 
VENTING OVER THE EASTERN PERIPHERY FUELING THE BURSTS OF DEEP 
CONVECTION. ADDITIONALLY, ANALYSIS REVEALS WARM (29-30C) SST AND LOW 
VERTICAL WIND SHEAR (5-10KTS). GLOBAL MODELS INDICATE THAT 90W WILL 
DRIFT WESTWARD TO WEST-SOUTHWESTWARD OVER THE NEXT TWO DAYS WITH WEAK 
DEVELOPMENT. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1009 MB. THE 
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN 
THE NEXT 24 HOURS REMAINS MEDIUM.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY:
      (1) THE AREA OF CONVECTION (SUBTROPICAL DEPRESSION 05E) PREVIOUSLY 
LOCATED NEAR 33.0N 175.1E IS NOW LOCATED EAST OF 180.0E (CENTRAL PACIFIC 
OCEAN) AND WILL NO LONGER BE DISCUSSED ON THE SIGNIFICANT TROPICAL 
WEATHER ADVISORY FOR THE WESTERN AND SOUTH PACIFIC OCEANS. 
      (2) NO OTHER SUBTROPICAL SYSTEMS.
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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