ABIO10 PGTW 290200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR/HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN 
REISSUED/290200Z-291800ZMAR2021//
REF/A/JOINT TYPHOON WRNCEN PEARL HARBOR HI/290121ZMAR21//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT CANCELLATION//
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 98S) PREVIOUSLY LOCATED 
NEAR 11.7S 68.3E IS NOW LOCATED NEAR 10.3S 69.5E, APPROXIMATELY 247 
NM SOUTHWEST OF DIEGO GARCIA. ANIMATED ENHANCED INFRARED (EIR) 
SATTELITE IMAGERY AND A 281357Z SSMIS 91GHZ MICROWAVE IMAGE SHOW 
DISORGANIZED CONVECTION TO THE SOUTHWEST OF AN EXPOSED LOW-LEVEL 
CIRCULATION (LLC). ENVIRONMENTAL ANALYSIS SHOWS INVEST 98S HAS POOR 
CONDITIONS FOR DEVELOPMENT, WITH WEAK OUTFLOW ALOFT AND HIGH (20-
30KTS) NORTHEASTERLY VERTICAL WIND SHEAR (VWS), ALTHOUGH OVER WARM 
(29-30C) SEA SURFACE TEMPERATURES. NUMERICAL MODELS GENERALLY AGREE 
THAT 98S WILL WEAKEN WHILE TRACKING EAST-NORTHEAST OVER THE NEXT 24-
48 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1003 MB. 
THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE 
WITHIN THE NEXT 24 HOURS IS DOWNGRADED TO LOW. SEE REF A (WTXS21 
PGTW 290130) FOR FURTHER DETAILS.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: DOWNGRADED AREA IN PARA 2.B.(1) TO 
LOW//
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