ABPW10 PGTW 210600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/210600Z-220600ZAUG2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/210151ZAUG2025//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 21AUG25 0000Z, TROPICAL STORM 18W (LINGLING) WAS LOCATED 
NEAR 32.0N 129.2E, APPROXIMATELY 71 NM SOUTH-SOUTHWEST OF SASEBO, JAPAN, 
AND HAD TRACKED EAST- NORTHEASTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. 
MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 40 KNOTS GUSTING TO 50 
KNOTS. SEE REF A (WTPN32 PGTW 210300) FOR FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 90W) PREVIOUSLY LOCATED NEAR 
12.2N 132.2E IS NOW LOCATED NEAR 15.1N 126.8E, APPROXIMATELY 339 NM EAST 
OF MANILA, PHILIPPINES. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) 
DEPICTS A BROAD, HIGHLY DISORGANIZED TROPICAL WAVE LIKE FEATURE WITH 
FLARING CONVECTION ALONG THE SOUTHERN PERIPHERY OF THE LOW LEVEL 
CIRCULATION. FURTHERMORE, A 210053Z ASCAT METOP-C 25KM PASS FURTHER 
EMPHASIZES THE BROAD NATURE OF THE SYSTEM AS IT APPROACHES THE EASTERN 
COAST OF LUZON, PHILIPPINES. THE ASCAT DATA AS WELL AS LATER MSI 
SUGGESTS THAT THE SYSTEM MAY BE STARTING TO CLOSE-OFF INTO A CLOSED 
CIRCULATION, THOUGH ONE THAT REMAINS VERY BROAD. ENVIRONMENTAL ANALYSIS 
REVEALS A MODERATELY FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH LOW TO 
MODERATE (15-20 KNOTS) NORTHERLY VERTICAL WIND SHEAR, MODERATE DUAL-
CHANNEL OUTFLOW, AND WARM (29-30 C) SEA SURFACE TEMPERATURES. 
DETERMINISTIC AND ENSEMBLE MODELS ARE IN AGREEMENT ON A WESTWARD TRACK 
OVER THE NEXT 24 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 
13 TO 18 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1008 
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE 
WITHIN THE NEXT 24 HOURS REMAINS LOW.
      (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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