ABPW10 PGTW 210230
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/210230Z-210600ZSEP2021//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) AN AREA OF CONVECTION (INVEST 99W) HAS PERSISTED NEAR 
10.3N 154.6E, APPROXIMATELY 703 NM EAST-SOUTHEAST OF GUAM. ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY (MSI) REVEALS AN ENLONGATED WAVE 
AXIS WITH THE LOW LEVEL CONVERGENCE OF SOUTHWESTERLY AND EASTERLY 
WINDS SUPPORTING AN AREA OF DEEP CONVECTION ON THE SOUTH SIDE OF 
THE WAVE AXIS. A 202347Z ASCAT-B IMAGE DEPICTS BROAD BELT OF 15-20 
KT WINDS ACCOMPANIED BY STRONG FLARING CONVECTION IN THE SOUTHERN 
HALF OF THE AREA. ENVIRONMENTAL ANALYSIS INDICATES A FAVORABLE 
ENVIRONMENT FOR DEVELOPMENT WITH A COMBINATION OF POLEWARD AND 
EQUATORWORD OUTFLOW, LOW (5-10 KT) VWS AND WARM (30-31C) SEA 
SURFACE TEMPERATURES. GLOBAL MODELS ARE IN AGREEMENT THAT INVEST 
99W WILL TRACK TO THE NORTHWEST. HOWEVER, THEY ARE SPLIT ON THE 
DEGREE OF DEVELOPMENT, WITH GFS BEING THE MOST AGGRESSIVE. MAXIMUM 
SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 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 IS 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.
3. JUSTIFICATION FOR REISSUE: UPGRADED AREA IN PARA 1.B.(1) TO A 
LOW .//
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