ABPW10 PGTW 290600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/290600Z-300600ZJUN2021//
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 95W) HAS PERSISTED NEAR 
20.0N 140.9E, APPROXIMATELY 423 NM NORTH-NORTHWEST OF GUAM. ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY SHOWS AN AREA OF FLARING, DEEP 
CONVECTION OBSCURING A WEAK LOW LEVEL CIRCULATION (LLC). A 290016Z 
MHS 89GHZ MICROWAVE PASS DEPICTS A WEAK, DISORGANIZED LLC. A PARTIAL 
282307Z ASCAT-A PASS SHOWS A SYMMETRIC LLC WITH AN AREA OF 10-15 KT 
WINDS, WITH ISOLATED 20 KT WINDS LOCATED JUST EAST OF THE LLC. 
INVEST 95W IS IN A MARGINAL ENVIRONMENT FOR DEVELOPMENT WITH LOW (10-
15 KTS) VERTICAL WIND SHEAR, AND WARM (29-30 CELSIUS) SEA SURFACE 
TEMPERATURES, OFFSET BY WEAK EQUATORWARD OUTFLOW ALOFT AND DRY AIR 
ENTRAINMENT FROM THE NORTH. DESPITE THE WELL DEFINED NATURE OF THE 
LLC, THE NUMERICAL MODELS INDICATE LITTLE TO NO DEVELOPMENT AS IT 
TRANSITS TO THE WEST. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED 
AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE 
NEAR 1010 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.//
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