ABPW10 PGTW 120600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS/120600Z-130600ZOCT2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/120152ZOCT2021// 
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/120153ZOCT2021// 
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 12OCT21 0000Z, TROPICAL STORM 23W (NAMTHEUN) WAS 
LOCATED NEAR 19.5N 153.1E, APPROXIMATELY 286 NM SOUTH OF MINAMI TORI 
SHIMA, AND HAD TRACKED WEST-NORTHWESTWARD AT 09 KNOTS OVER THE PAST 
SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 45 
KNOTS GUSTING TO 55 KNOTS. SEE REF A (WTPN32 PGTW 120300) FOR 
FURTHER DETAILS.
      (2) AT 12OCT21 0000Z, TROPICAL STORM 24W (KOMPASU) WAS LOCATED 
NEAR 18.8N 119.2E, APPROXIMATELY 272 NM NORTH-NORTHWEST OF MANILA, 
PHILIPPINES, AND HAD TRACKED WESTWARD AT 12 KNOTS OVER THE PAST SIX 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 55 KNOTS 
GUSTING TO 70 KNOTS. SEE REF B (WTPN33 PGTW 120300) FOR FURTHER 
DETAILS.
      (3) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) AN AREA OF CONVECTION (INVEST 96W) IS LOCATED NEAR 10.8N 
146.7E, APPROXIMATELY 198 NM SE OF GUAM. ANIMATED MULTISPECTRAL 
SATELLITE IMAGERY DEPICTS A BROAD, DISORGANIZED LOW-LEVEL 
CIRCULATION (LLC) WITH FLARING CONVECTION IN THE SOUTHWESTERN 
QUADRANT. A 111809Z SSMIS 91GHZ MICROWAVE IMAGE INDICATES SHALLOW 
BANDING OVER THE EASTERN SEMICIRCLE WITH A WEAKLY DEFINED CENTER. A 
120004Z ASCAT-C IMAGE REVEALS 10-15 KNOT SOUTHERLY WINDS OVER THE 
EASTERN SEMICIRCLE. UPPER-LEVEL ANALYSIS INDICATES THE DISTURBANCE 
IS LOCATED UNDER SOUTHERLY FLOW ALONG THE EASTERN PERIPHERY OF AN 
UPPER-LEVEL LOW WITH MODERATE TO STRONG (20 TO 25 KNOTS) VERTICAL 
WIND SHEAR. GLOBAL MODELS INDICATE NO SIGNIFICANT DEVELOPMENT AS THE 
SYSTEM DRIFTS NORTHWESTWARD OVER THE NEXT TWO DAYS WITH PERSISTENT 
MARGINAL CONDITIONS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED 
AT 10 TO 15 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE 
NEAR 1006 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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