ABPW10 PGTW 060600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/060600Z-070600ZSEP2025//
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 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 
17.6N 118.7E IS NOW LOCATED NEAR 17.9N 177.6E, APPROXIMATELY 328 NM 
NORTHWEST OF HONG KONG. ANIMATED MULTISPECTRAL SATELLITE 
IMAGERY (MSI) DEPICTS A CONSOLIDATING SYSTEM WITH IMPROVED CONVECTIVE 
BANDING. A 060112Z ASCAT-C PASS SHOWS WINDS OF 25-30 KNOTS WRAPPING 
AROUND THE CENTER OF THE SYSTEM. ENVIRONMENTAL ANALYSIS REVEALS A 
FAVORABLE ENVIRONMENT WITH LOW TO MODERATE VERTICAL WIND SHEAR OF 15-
20 KNOTS, STRONG EQUATORWARD OUTFLOW, AND WARM SEA SURFACE 
TEMPERATURES (SST) OF 29-30 C. DETERMINISTIC AND ENSEMBLE MODELS ARE 
IN AGREEMENT ON INTENSITY AND TIMELINE OF THE SYSTEM AS WELL AS A 
GENERAL NORTHWESTWARD TRACK TOWARDS CHINA. 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 REMAINS 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.//
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