ABPW10 PGTW 180600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/180600Z-190600ZMAR2023//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   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:
      (1) THE AREA OF CONVECTION (INVEST 91P) PREVIOUSLY LOCATED NEAR 
20.2S 177.2W IS NOW LOCATED NEAR 20.1S 177.2W, APPROXIMATELY 131 NM WEST-
NORTHWEST OF TONGA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) AND AN 
180130Z AMSR2 89GHZ PASS DEPICT A FULLY EXPOSED LOW-LEVEL CIRCULATION 
CENTER (LLCC) WITH DEEP CONVECTION SHEARED TO THE EAST-SOUTHEASTERN 
PERIPHERY. ENVIRONMENTAL ANALYSIS REVEALS UNFAVORABLE CONDITIONS FOR 
DEVELOPMENT WITH WEAK OUTFLOW OVER THE LLCC (MAINLY OVER THE CONVECTION), 
HIGH (30-40KT) VERTICAL WIND SHEAR, AND SLIGHTLY OFFSET BY WARM (28-29C) 
SEA SURFACE TEMPERATURES. GLOBAL MODELS ARE IN GENERAL AGREEMENT THAT 
INVEST 91P WILL CONTINUE ON A WESTERLY TRACK AND GRADUALLY DISSIPATE OVER 
THE NEXT FEW DAYS, YET THE SMALL NATURE OF THIS SYSTEM COULD BE GIVING 
THE MODELS A SMOOTH HEAD FAKE AND THE SYSTEM COULD INTENSIFY MORE IF IT 
CAN MOVE AWAY FROM THE IMMENSE AMOUNT OF SHEAR. MAXIMUM SUSTAINED SURFACE 
WINDS ARE ESTIMATED AT 22 TO 28 KNOTS. MINIMUM SEA LEVEL PRESSURE IS 
ESTIMATED TO BE NEAR 1009 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.//
NNNN