ABPW10 PGTW 050600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/050600Z-060600ZSEP2023//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/041953ZSEP2023//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/041951ZSEP2023//
REF/C/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/050151ZSEP2023//
NARR/REFS A AND B ARE TROPICAL CYCLONE WARNINGS. REF C IS A TROPICAL 
CYCLONE FORMATION ALERT.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 04SEP23 1800Z, TROPICAL DEPRESSION 10W (HAIKUI) WAS 
LOCATED NEAR 23.7N 117.3E, APPROXIMATELY 191 NM EAST-NORTHEAST OF HONG 
KONG, AND HAD TRACKED WESTWARD AT 11 KNOTS OVER THE PAST SIX HOURS. 
MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 30 KNOTS GUSTING TO 
40 KNOTS. SEE REF A (WTPN33 PGTW 042100) FOR THE FINAL WARNING ON THIS 
SYSTEM.
      (2) AT 04SEP23 1800Z, TROPICAL DEPRESSION 11W (KIROGI) WAS 
LOCATED NEAR 30.7N 133.5E, APPROXIMATELY 227 NM SOUTH-SOUTHEAST OF 
IWAKUNI, JAPAN, AND HAD TRACKED SOUTHWESTWARD AT 11 KNOTS OVER THE 
PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 25 
KNOTS GUSTING TO 35 KNOTS. SEE REF B (WTPN31 PGTW 042100) FOR THE 
FINAL WARNING ON THIS SYSTEM.
      (3) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 99W) PREVIOUSLY LOCATED NEAR 
21.9N 131.7E IS NOW LOCATED NEAR 21.8N 131.7E, APPROXIMATELY 346 NM 
SOUTHEAST OF OKINAWA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS 
LOW LEVEL CLOUD LINES WRAPPING INTO A DEFINED CENTER WITH 
CONSOLIDATING DEEP CONVECTION. HOWEVER, A 050031Z GMI 37 GHZ MICROWAVE 
IMAGE REVEALS AN ELONGATED AND DISORGANIZED SYSTEM WITH A WEAKLY 
DEFINED LOW LEVEL CIRCULATION CENTER (LLCC). ENVIRONMENTAL ANALYSIS 
INDICATES A MARGINALLY FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH GOOD 
POLEWARD AND EQUATORWARD OUTFLOW AND WARM (29-30 C) SST OFFSET BY 
MODERATE TO HIGH (20-25 KTS) VERTICAL WIND SHEAR. GLOBAL MODELS SHOW 
99W TRACKING NORTH-NORTHEASTWARD TOWARD CENTRAL JAPAN OVER THE NEXT 48 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 17 TO 22 
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 C (WTPN21 PGTW 050200) 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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