ABIO10 PGTW 261800 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN /OCEAN/261800Z-271800ZNOV2021// RMKS/ 1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF AFRICA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: NONE. C. SUBTROPICAL SYSTEM SUMMARY: NONE. 2. SOUTH INDIAN OCEAN AREA (135E WEST TO COAST OF AFRICA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: (1) THE AREA OF CONVECTION (INVEST 91S) PREVIOUSLY LOCATED NEAR 10.9S 92.1E IS NOW LOCATED NEAR 9.7S 91.0E, APPROXIMATELY 377 NM WEST-NORTHWEST OF COCOS ISLANDS. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY (EIR) AND A 261215Z GMI 89GHZ PASS DEPICT FLARING CONVECTION WRAPPING INTO A BROAD LOW-LEVEL CIRCULATION CENTER (LLCC). ENVIRONMENTAL ANALYSIS INDICATES MARGINAL CONDITIONS WITH HIGH TO MODERATE (20-30KT) VWS AND DECREASED UPPER-LEVEL OUTFLOW OFFSET BY WARM (27-28C) SEA SURFACE TEMPERATURES. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT THE SYSTEM WILL TRACK WEST-SOUTHWESTWARD AND WILL MARGINALLY DEVELOP WITH GFS BEING THE MOST AGGRESSIVE MODEL. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1007 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE.// NNNN