ABIO10 PGTW 290230 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN REISSUED/290230Z-291800ZMAR2023// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/290151ZMAR2023// AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.// 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 96S) PREVIOUSLY LOCATED NEAR 12.9S 98.9E IS NOW LOCATED AT 13.3S 99.3E, APPROXIMATELY 158 NM EAST- SOUTHEAST OF COCOS ISLAND, AUSTRALIA. ANIMATED ENHANCED MULTISPECTRAL SATELLITE IMAGERY AND A 280120Z HIMAWARI-9 VIS IMAGE DEPICTS A FULLY OBSCURED LLCC WITH QUAZI-STATIONARY CONVECTION BUILDING OVERHEAD. ENVIRONMENTAL ANALYSIS SHOWS 96S TO BE IN A MODERATELY FAVORABLE ENVIRONMENT WITH GOOD POLAR UPPER LEVEL OUTFLOW, WARM SEA SURFACE TEMPERATURES (28-29C) OFFSET BY HIGH VWS (25-30 KTS). GLOBAL MODELS ARE IN GOOD AGREEMENT THAT 96S WILL TRACK SOUTH EASTWARD INTO A LOWER AREA OF VWS AND DEVELOP OVER THE NEXT 12-24 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 27 TO 32 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 999 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO HIGH. SEE REF A (WTSX21 PGTW 280200) FOR FURTHER DETAILS. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE. 3. JUSTIFICATION FOR REISSUE: UPGRADED AREA IN PARA 2.B.(1) TO HIGH.// NNNN