ABIO10 PGTW 171800
MSGID/GENADMIN/JOINT TYPHOON WRNCEN/PEARL/HARBOR/HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE 
INDIAN/OCEAN/171800Z-181800ZDEC2020//
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 93S) PREVIOUSLY LOCATED 
NEAR 7.4S 86.0E IS NOW LOCATED NEAR 7.4S 86.8E, APPROXIMATELY 850NM 
EAST OF DIEGO GARCIA. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY 
AND A 171255Z SSMIS F-17 91H IMAGE DEPICT A WEAK LOW-LEVEL 
CIRCULATION WITH SOME SHEARED CONVECTION OVERHEAD. A RECENT ASCAT-C 
IMAGE REVEALS 20-25 KNOT WINDS WRAPPING INTO THE CIRCULATION FROM 
THE NORTHERN EDGE. INVEST 93S IS CURRENTLY IN A MARGINALLY FAVORABLE 
ENVIRONMENT FOR DEVELOPMENT WITH WARM (29-30C) SEA SURFACE 
TEMPERATURES, BROAD DIFFLUENCE ALOFT, AND HIGH (30-35 KNOTS) 
VERTICAL WIND SHEAR. GLOBAL MODELS ARE IN GENERAL AGREEMENT SHOWING 
INVEST 93S TRACKING GENERALLY EASTWARD WITH LITTLE TO NO 
INTENSIFICATION. 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 REMAINS LOW.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE. //
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