ABIO10 PGTW 080730
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN 
OCEAN REISSUED/080730Z-081800ZDEC2020//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/071951ZDEC2020//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/080521ZDEC2020//
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: 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 07DEC20 2100Z, TROPICAL CYCLONE 02S (BONGOYO) WAS
LOCATED NEAR 15.8S 79.5E, APPROXIMATELY 670 NM SOUTHEAST OF DIEGO
GARCIA, AND HAD TRACKED WEST-SOUTHWESTWARD AT 10 KNOTS OVER THE PAST
SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 45
KNOTS GUSTING TO 55 KNOTS. SEE REF A (WTXS31 PGTW 072100) FOR
FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 96S) PREVIOUSLY LOCATED
NEAR 10.6S 108.0E IS NOW LOCATED NEAR 11.5S 107.6E, APPROXIMATELY
324 NM SOUTH-SOUTHEAST OF JAKARTA, INDONESIA. ANIMATED MULTISPECTRAL
SATELLITE IMAGERY DEPICTS DEEP CONVECTIVE BANDING WRAPPING TIGHTLY
INTO A RAPIDLY CONSOLIDATING LOW LEVEL CIRCULATION. A 072254Z SSMIS
91GHZ MICROWAVE IMAGE DEPICTS AN AREA OF DEEP CONVECTION IN THE
WESTERN PERIPHERY OF A WEAK LOW LEVEL CYCLONIC CIRCULATION (LLCC).
A 071349Z ASCAT-A IMAGE DEPICTS AN ASYMMETRIC CIRCULATION WITH
A RELATIVELY SMALL AREA OF 30-35KT WINDS OVER THE NORTHERN
SEMICIRCLE. INVEST 96S IS IN A MARGINALLY FAVORABLE ENVIRONMENT WITH
ROBUST EQUATORWARD OUTFLOW ALOFT AND MODERATE TO HIGH (20-25KTS)
VERTICAL WIND SHEAR OFFSET BY WARM (28-29C) SEA SURFACE
TEMPERATURES. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT INVEST 96S
WILL INTENSIFY AND CONTINUE TO TRACK SOUTHEASTWARD TOWARDS NORTHWEST
AUSTRALIA. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 30 TO 35
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1000 MB.
THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE
WITHIN THE NEXT 24 HOURS IS HIGH. SEE REF B (WTXS22 PGTW 080530) FOR
FURTHER DETAILS.
      (2) THE AREA OF CONVECTION (INVEST 99S) PREVIOUSLY LOCATED
NEAR 15.8S 118.9E IS NOW LOCATED NEAR 16.8S 119.4E, APPROXIMATELY
304 NM WEST-NORTHWEST OF BROOME, AUSTRALIA. ANIMATED ENHANCED
INFRARED SATELLITE IMAGERY DEPICTS LOW LEVEL TURNING WITH FLARING
CONVECTION. A 071418Z METOP-C ASCAT IMAGE REVEALS A BROAD
CIRCULATION WITH 15-20 KT WINDS. INVEST 99S IS IN A MARGINAL
ENVIRONMENT FOR DEVELOPMENT WITH MEDIUM (15-20KTS) VERTICAL WIND
SHEAR, EQUATORWARD AND POLEWARD OUTFLOW ALOFT, AND WARM (29-30C) SEA
SURFACE TEMPERATURES. GLOBAL MODELS ARE IN FAIR AGREEMENT THAT
INVEST 99S WILL CONTINUE TO TRACK SOUTHEASTWARD TOWARDS AUSTRALIA
WITH SOME CONSOLIDATION BEFORE MAKING LANDFALL. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 17 TO 23 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS REMAINS LOW.
      (3) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
3. JUSTIFICATION FOR REISSUE: REISSUED THE TROPICAL CYCLONE 
FORMATION ALERT IN PARA 1.B.(1).
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