ABPW10 PGTW 270130
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/270130Z-270600ZMAY2021//
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 6.6N 
146.9E, APPROXIMATELY 425 NM SOUTH-SOUTHEAST OF GUAM. ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY REVEALS DEEP CONVECTION TO THE NORTH 
OF A DEFINED LOW LEVEL CIRCULATION CENTER (LLCC). A 261847Z 91 GHZ 
COLOR COMPOSITE MICROWAVE IMAGE DEPICTS FORMATIVE CONVECTIVE BANDING 
OVER THE NORTHERN SEMICIRCLE OF THE LLCC. INVEST 99W IS LOCATED 
WITHIN A FAVORABLE ENVIRONMENT CHARACTERIZED BY LOW (5-10KTS) 
VERTICAL WIND SHEAR, WARM (29-30 DEGREES CELSIUS) SEA SURFACE 
TEMPERATURES, AND DIVERGENCE ALOFT. MODEL GUIDANCE INDICATES THAT 
THIS SYSTEM WILL STEADILY CONSOLIDATE AS IT TRACKS WESTWARD.  
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) AN AREA OF CONVECTION (INVEST 90W) HAS PERSISTED NEAR 5.7N 
157.9E, APPROXIMATELY 373 NM EAST-SOUTHEAST OF CHUUK. ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY DEPICTS A PARTIALLY EXPOSED LOW 
LEVEL CIRCULATION WITH FLARING CONVECTION OVER THE EASTERN 
SEMICIRCLE. A 262110Z ASCAT-A PASS REVEALS STRONGER WINDS (20-25KTS) 
NORTH OF THE CONSOLIDATING CIRCULATION WITH WEAKER WINDS ELSEWHERE. 
UPPER LEVEL ANALYSIS INDICATES LOW (10-15KTS) VERTICAL WIND SHEAR 
AND A DEVELOPING EQUATORWARD 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 20 TO 25 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.
      (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.
3. JUSTIFICATION FOR REISSUE: ADDED PARAGRAPHS 1.B.(1) AND 1.B.
(2). //
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