ABPW10 PGTW 101730
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS REISSUED 101730Z-110600ZSEP2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/101352ZSEP2021//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/101351ZSEP2021//
REF/C/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/101651ZSEP2021//
NARR/REFS A AND B ARE TROPICAL CYCLONE WARNINGS.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 10SEP21 1200Z, SUPER TYPHOON 19W (CHANTHU) WAS LOCATED 
NEAR 18.7N 122.8E, APPROXIMATELY 267 NM NORTH-NORTHEAST OF MANILA, 
PHILIPPINES, AND HAD TRACKED NORTHWESTWARD AT 10 KNOTS OVER THE 
PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 
140 KNOTS GUSTING TO 170 KNOTS. SEE REF A (WTPN32 PGTW 101500) FOR 
FURTHER DETAILS.
      (2) AT 10SEP21 1200Z, TROPICAL STORM 18W (CONSON) WAS LOCATED 
NEAR 15.6N 111.4E, APPROXIMATELY 181 NM EAST OF DA NANG, VIETNAM, 
AND HAD TRACKED WESTWARD AT 06 KNOTS OVER THE PAST SIX HOURS. 
MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 40 KNOTS GUSTING 
TO 50 KNOTS. SEE REF B (WTPN31 PGTW 101500) FOR FURTHER DETAILS.
      (3) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY: 
      (1)AN AREA OF CONVECTION (INVEST 96W) HAS PERSISTED NEAR 
22.7N 124.9E, APPROXIMATELY 102 NM SOUTH-SOUTHEAST OF ISHIGAKIJIMA. 
ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS 
PERSISTENT CONVECTION OBSCURING A LOW LEVEL CIRCULATION CENTER 
(LLCC). A 101148Z ASCAT-A IMAGE REVEALS AN ASYMMETRIC WIND FIELD 
WITH SHARPLY CURVED WINDS IN THE NORTHERN PERIPHERY, 25-30 KT WINDS 
IN THE EASTERN PERIPHERY, AND LIGHT WINDS TO THE WEST OF THE LLCC. 
INVEST 96W IS EMBEDDED IN THE NORTHERN PERIPHERY OF STY 19W AND IS 
UNDERGOING FUJIWARA INTERACTION WITH RAPID TRACK SPEEDS. INVEST 96W 
IS UNDER THE WESTERLY OUTFLOW FROM STY 19W, HOWEVER, VERTICAL WIND 
SHEAR IS MODERATE (15-20 KNOTS) ALLOWING DEEP CONVECTION TO PERSIST 
AND WEAKLY ORGANIZE. ADDITIONALLY, SEA SURFACE TEMPERATURES ARE 
WARM AT 29-30C. GLOBAL MODELS INDICATE INVEST 96W WILL CONTINUE TO 
ROTATE RAPIDLY AROUND THE PERIPHERY OF STY 19W AND WILL EVENTUALLY 
DISSIPATE AS IT BECOMES ABSORBED WITHIN THE NEXT 12 TO 18 HOURS. 
THERE IS A NARROW WINDOW FOR DEVELOPMENT BEFORE THE SYSTEM TRACKS 
OVER THE MOUNTAINOUS TERRAIN OF TAIWAN. MAXIMUM SUSTAINED SURFACE 
WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE 
IS ESTIMATED TO BE NEAR 1004 MB. THE POTENTIAL FOR THE DEVELOPMENT 
OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS HIGH. 
SEE REF C (WTPN PGTW 101700) FOR FURTHER DETAILS.
   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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