ABPW10 PGTW 060030
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED/060030Z-060600ZJUL2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/051951ZJUL2021//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/060021ZJUL2021//
NARR/REF A IS A TROPICAL CYCLONE WARNING. REF B IS A TROPICAL
/CYCLONE FORMATION ALERT.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 05JUL21 1800Z, TROPICAL DEPRESSION 07W (SEVEN) WAS 
LOCATED NEAR 21.6N 120.3E, APPROXIMATELY 220 NM SOUTH-SOUTHWEST OF 
TAIPEI, TAIWAN, AND HAD TRACKED WEST- NORTHWESTWARD AT 17 KNOTS OVER 
THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED 
AT 30 KNOTS GUSTING TO 40 KNOTS. SEE REF A (WTPN31 PGTW 052100) FOR 
FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 97W) PREVIOUSLY LOCATED 
NEAR 15.4N 113.0E IS NOW LOCATED NEAR 15.6N 112.5E, APPROXIMATELY 
298 NM SOUTHEAST OF HAINAN. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY AND A 052108Z SSMI 85GHZ MICROWAVE IMAGE DEPICT A BROAD LOW
LEVEL CIRCULATION (LLC) WITH FLARING CONVECTION SHEARED ALONG THE
WESTERN SEMICIRCLE OF THE LLC. UPPER-LEVEL ANALYSIS REVEALS A
FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH LOW TO MODERATE VERTICAL
WIND SHEAR (VWS), GOOD POLEWARD OUTFLOW, AND WARM SEA SURFACE
TEMPERATURES (30-31C). GLOBAL DYNAMIC MODELS ARE IN GOOD AGREEMENT
THAT 97W WILL CONTINUE TO TRACK ALONG THE PERIPHERY OF A SUBTROPICAL
RIDGE SITUATED TO THE NORTHEAST AS IT CONSOLIDATES AND TRACKS
TOWARDS HAINAN. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 18 
TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1002 
MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL 
CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO HIGH. SEE REF B 
(WTPN21 PGTW 060030) FOR FURTHER DETAILS.
      (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 
HIGH.//
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