ABPW10 PGTW 050600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/050600Z-060600ZSEP2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/050151ZSEP2025//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 05SEP25 0000Z, TROPICAL STORM 21W (PEIPAH) WAS LOCATED NEAR 
33.9N 135.5E, APPROXIMATELY 171 NM EAST OF IWAKUNI, JAPAN, AND HAD 
TRACKED EAST-NORTHEASTWARD AT 24 KNOTS OVER THE PAST SIX HOURS. MAXIMUM 
SUSTAINED SURFACE WINDS WERE ESTIMATED AT 40 KNOTS GUSTING TO 50 KNOTS. 
SEE REF A (WTPN31 PGTW 050300) FOR FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED NEAR 
17.3N 119.4E IS NOW LOCATED NEAR 18.0N 118.9E, APPROXIMATELY 373 NM 
SOUTHEAST OF HONG KONG. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) 
DEPICTS A CONSOLIDATING CIRCULATION CENTER THAT IS OBSCURED BY FLARING 
CONVECTION. 050133Z AND 050223Z ASCAT IMAGES REVEAL AN ELONGATED 
CIRCULATION WITH A SWATH OF ELEVATED WINDS (15-20 KTS) ALONG THE EASTERN 
SIDE OF THE SYSTEM. ENVIRONMENTAL ANALYSIS FOR THE AREA INDICATES A 
FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH LOW TO MODERATE (15-20 KTS) 
VERTICAL WIND SHEAR, WARM (29-30 C) SEA SURFACE TEMPERATURES, AND 
MODERATE EQUATORWARD OUTFLOW ALOFT. ENSEMBLES ARE IN GOOD AGREEMENT THAT 
97W WILL TRACK NORTHWESTWARD FROM THE WESTERN COASTLINE OF LUZON TOWARDS 
MAINLAND CHINA AND CONTINUE TO DEVELOP OVER THE NEXT 48 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 MEDIUM.
      (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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