ABPW10 PGTW 060600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/060600Z-070600ZSEP2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/060151ZSEP2021//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/052321ZSEP2021//
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 06SEP21 0000Z, TROPICAL DEPRESSION 18W (EIGHTEEN) WAS 
LOCATED NEAR 10.5N 127.5E, APPROXIMATELY 453 NM EAST-SOUTHEAST OF 
MANILA, PHILIPPINES, AND HAD TRACKED WEST- NORTHWESTWARD AT 10 KNOTS 
OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE 
ESTIMATED AT 30 KNOTS GUSTING TO 40 KNOTS. SEE REF A (WTPN31 PGTW 
060300) FOR FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 94W) PREVIOUSLY LOCATED 
NEAR 13.2N 139.1E IS NOW LOCATED NEAR 14.6N 137.8E, APPROXIMATELY 
398 NM WEST OF GUAM. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) 
DEPICTS A COMPACT SYSTEM WITH PERSISTENT CONVECTION. UPPER-LEVEL 
ANALYSIS REVEALS A FAVORABLE ENVIRONMENT WITH WARM SEA SURFACE 
TEMPERATURES (30C), LOW VWS (<15KT) AND EQUATORIAL OUTFLOW. GLOBAL 
MODELS GENERALLY AGREE THAT INVEST 94W WILL UNDERGO MINIMAL, IF ANY, 
INTENSIFICATION AS IT PROCEEDS NORTHWESTWARD DURING THE NEXT 12-24 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 TO 23 
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 (WTPN22 PGTW 
052330) 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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