ABPW10 PGTW 270600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/270600Z-280600ZMAY2021//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 99W) PREVIOUSLY LOCATED 
NEAR 6.6N 146.9E IS NOW LOCATED NEAR 7.4N 145.8E, APPROXIMATELY 363 
NM WEST OF CHUUK. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) 
DEPICTS A WEAKLY DEFINED LOW LEVEL CIRCULATION WITH FLARING 
CONVECTION OVER THE EASTERN SEMICIRCLE. UPPER LEVEL ANALYSIS 
INDICATES LOW (05-10KTS) VERTICAL WIND SHEAR AND A DEVELOPING 
POLEWARD OUTFLOW CHANNEL. SEA SURFACE TEMPERATURES ARE FAVORABLE FOR 
DEVELOPMENT AT 29-30 DEGREES CELSIUS. GLOBAL MODELS ARE IN GOOD 
AGREEMENT THAT INVEST 99W WILL CONTINUE TO TRACK WESTWARD AS IT 
DEVELOPS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1007 MB. 
THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE 
WITHIN THE NEXT 24 HOURS REMAINS LOW.
      (2) THE AREA OF CONVECTION (INVEST 90W) PREVIOUSLY LOCATED 
NEAR 5.7N 157.9E IS NOW LOCATED NEAR 5.1N 152.4E, APPROXIMATELY 128 
NM WEST-SOUTHWEST OF POHNPEI. ANIMATED MULTISPECTRAL SATELLITE 
IMAGERY DEPICTS FLARING DEEP CONVECTION OVER A POORLY DEFINED LOW 
LEVEL CIRCULATION. UPPER LEVEL ANALYSIS INDICATES LOW (10-15KTS) 
VERTICAL WIND SHEAR AND A DEVELOPING POLEWARD OUTFLOW CHANNEL. SEA 
SURFACE TEMPERATURES ARE FAVORABLE FOR DEVELOPMENT AT 29-30 DEGREES 
CELSIUS. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT INVEST 90W WILL 
CONTINUE TO TRACK WESTWARD AS IT DEVELOPS. MAXIMUM SUSTAINED SURFACE 
WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS 
ESTIMATED TO BE NEAR 1007 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A 
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW.
      (3) 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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