ABIO10 PGTW 090330 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN /REISSUED/090330Z-091800ZJAN2021// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/090151ZJAN2021// AMPN/REF A IS A TROPICAL CYCLONE WARNING.// 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: (1) AT 09JAN21 0000Z, TROPICAL CYCLONE 08S (DANILO) WAS LOCATED NEAR 18.4S 64.2E, APPROXIMATELY 404 NM EAST-NORTHEAST OF PORT LOUIS, MAURITIUS, AND HAD TRACKED WESTWARD AT 13 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 25 KNOTS GUSTING TO 35 KNOTS. SEE REF A (WTXS31 PGTW 090300) FOR THE FINAL WARNING ON THIS SYSTEM. (2) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: (1) AN AREA OF CONVECTION (INVEST 98S) HAS PERSISTED NEAR 13.9S 100.9E, APPROXIMATELY 345 NM SOUTHWEST OF CHRISTMAS ISLAND. ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND A 082052Z SSMIS 91GHZ MICROWAVE PASS DISPLAYS FORMATIVE BANDING WRAPPING INTO A POORLY DEFINED LOW LEVEL CIRCULATION CENTER (LLCC) WITH FLARING CONVECTION IN THE NORTHERN SEMI-CIRCLE. INVEST 98S IS IN AN ENVIRONMENT FAVORABLE FOR FURTHER TROPICAL DEVELOPMENT WITH ROBUST POLEWARD OUTFLOW, LOW (10-15KTS) VERTICAL WIND SHEAR, AND WARM (29-30C) SEA SURFACE TEMPERATURES. MODELS ARE IN GOOD AGREEMENT THAT INVEST 98S WILL TRACK TO THE SOUTHWEST AND WILL CONTINUE A SLOW INTENSIFICATION TREND OVER THE NEXT SEVERAL DAYS. 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 LOW. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE. 3. JUSTIFICATION FOR REISSUE: ISSUED FINAL WARNING FOR TC 08S AND UPGRADED AREA IN PARA. 2.B.(1) TO LOW.// NNNN