ABPW10 PGTW 051500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS REISSUED/051500Z-060600ZSEP2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/051351ZSEP2025//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/051421ZSEP2025//
NARR/REF A IS A TROPICAL CYCLONE FINAL WARNING. REF B IS A TROPICAL 
CYCLONE FORMATION ALERT.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 05SEP25 1200Z, TROPICAL STORM 21W (PEIPAH) WAS LOCATED NEAR 
35.6N 142.9E, APPROXIMATELY 157 NM EAST OF YOKOSUKA, JAPAN, AND HAD 
TRACKED EAST-NORTHEASTWARD AT 30 KNOTS OVER THE PAST SIX HOURS. MAXIMUM 
SUSTAINED SURFACE WINDS WERE ESTIMATED AT 50 KNOTS GUSTING TO 65 KNOTS. 
SEE REF A (WTPN31 PGTW 051500) FOR THE FINAL WARNING ON THIS SYSTEM.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED NEAR 
18.0N 118.9E IS NOW LOCATED NEAR 17.6N 118.7E, APPROXIMATELY 381 NM 
SOUTHEAST OF HONG KONG. ANIMATED ENHANCED INFRARED IMAGERY (EIR) DEPICTS 
A CONSOLIDATING CIRCULATION WITH A BAND OF FLARING CONVECTION JUST SOUTH 
OF THE CENTER ASSISTING THE SYSTEM WITH A LINE OF CONVERGENCE DEEPENING 
THE CONVECTION. A 051241Z METOP-B ASCAT IMAGE REVEALS 15-20 KT WINDS 
FROM THE NORTHEAST AND THE SOUTHWEST BEGINNING TO WRAP CLOSER TO THE 
CIRCULATION CENTER. ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES A 
FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH LOW (10-15 KTS) VERTICAL WIND 
SHEAR, WARM (30 C) SEA SURFACE TEMPERATURES, AND MODERATE EQUATORWARD 
OUTFLOW ALOFT. ENSEMBLES ARE IN GOOD AGREEMENT THAT 97W WILL TRACK 
NORTHWESTWARD TOWARDS MAINLAND CHINA WITH CONTINUED CONSOLIDATION OVER 
THE NEXT 24 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 
TO 20 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 UPGRADED TO HIGH. SEE REF B (WTPN21 PGTW 
051430) 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.
3. JUSTIFICATION FOR REISSUE: UPDATED PARA. 1.A. (1) WITH 21W FINAL 
WARNING INFORMATION AND UPGRADED AREA IN 1.B. (1) TO HIGH.//
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