ABPW10 PGTW 260600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/260600Z-270600ZJUL2023//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/260151ZJUL2023//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/260551ZJUL2023//
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 26JUL23 0000Z, TYPHOON 05W (DOKSURI) WAS LOCATED NEAR 
18.9N 121.4E, APPROXIMATELY 238 NM SOUTH-SOUTHEAST OF KAOHSIUNG, 
TAIWAN, AND HAD TRACKED WEST-SOUTHWESTWARD AT 02 KNOTS OVER THE PAST 
SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 110 
KNOTS GUSTING TO 135 KNOTS. SEE REF A (WTPN31 PGTW 260300) FOR 
FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 91W) PREVIOUSLY LOCATED NEAR 
8.7N 141.6E IS NOW LOCATED NEAR 9.3N 141.7E, APPROXIMATELY 211 NM 
EAST OF YAP. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS BROAD 
TURNING AND A WEAK LOW-LEVEL CIRCULATION (LLC) WITH IMPROVED 
CONVECTION AND FORMATIVE BANDING WRAPPING INTO THE LLC ALONG THE 
SOUTHERN PERIPHERY. THE FORMATIVE BANDING IS FURTHER EVIDENT IN A 
252135Z SSMIS 91GHZ MICROWAVE IMAGE. LOCAL OBSERVATIONS FROM YAP 
REVEAL A DEEPENING PRESSURE CENTER WITH A 24 HOUR PRESSURE FALL OF 
0.6 MB. INVEST 91W REMAINS IN A MARGINAL ENVIRONMENT FOR DEVELOPMENT 
DUE TO NORTHERLY OUTFLOW FROM TY 05W PLACING THE SYSTEM UNDER 
MODERATE TO HIGH (20-25KT) VERTICAL WIND SHEAR. SEA SURFACE 
TEMPERATURES REMAIN CONDUCIVE AT A WARM 29-30C. GLOBAL MODELS ARE IN 
STRONG AGREEMENT THAT INVEST 91W WILL STEADILY CONSOLIDATE AS IT 
TRACKS NORTH-NORTHWESTWARD OVER THE NEXT 24-48 HOURS. MAXIMUM 
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 KNOTS. MINIMUM 
SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1006 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 260600) 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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