ABIO10 PGTW 221600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN
/REISSUED/221600Z-221800ZNOV2020//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/221351ZNOV2020//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/221521ZNOV2020//
NARR/REF A IS A TROPICAL CYCLONE WARNING. REF B IS A TROPICAL
/CYCLONE FORMATION ALERT.//
RMKS/
1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF AFRICA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 22NOV20 1200Z, TROPICAL CYCLONE 03A (GATI) WAS LOCATED 
NEAR 10.4N 51.5E, APPROXIMATELY 408 NM EAST-SOUTHEAST OF ADEN, 
YEMEN, AND HAD TRACKED WESTWARD AT 10 KNOTS OVER THE PAST SIX HOURS. 
MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 90 KNOTS GUSTING 
TO 110 KNOTS. SEE REF A (WTIO31 PGTW 221500) FOR FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 97B) PREVIOUSLY LOCATED 
NEAR 7.5N 85.7E IS NOW LOCATED NEAR 8.2N 85.4E, APPROXIMATELY 423 NM 
SOUTHEAST OF CHENNAI, INDIA. ANIMATED ENHANCED INFRARED SATELLITE 
IMAGERY AND A 220800Z AMSR2 89GHZ MICROWAVE IMAGE REVEAL A BROAD 
CONSOLIDATING SYSTEM WITH FORMATIVE BANDING IN THE NORTHERN 
SEMICIRCLE WRAPPING INTO THE WESTERN SEMICIRCLE. ENVIRONMENTAL 
ANALYSIS REVEALS A FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH GOOD 
POLEWARD AND EQUATORWARD OUTFLOW, LOW (<15KTS) VERTICAL WIND SHEAR, 
AND WARM (28-29C) SEA SURFACE TEMPERATURES. GLOBAL MODELS ARE IN 
GOOD AGREEMENT THAT INVEST 97B WILL CONTINUE TO CONSOLIDATE AND 
INTENSIFY AS IT TRACKS NORTHWESTWARD TOWARD INDIA OVER THE NEXT 24-
36 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 
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 UPGRADED TO HIGH. SEE REF B (WTIO21 PGTW 
221530) FOR FURTHER DETAILS.
      (2) NO OTHER SUSPECT AREAS.
   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: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: UPGRADED AREA IN PARA 1.B.(1) TO 
HIGH.//
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