ABIO10 PGTW 240500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN
/REISSUED/240500Z-241800ZFEB2022//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/231951ZFEB2022//
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 23FEB22 1800Z, TROPICAL CYCLONE 13S (EMNATI) WAS 
LOCATED NEAR 24.7S 43.5E, APPROXIMATELY 236 NM SOUTHEAST OF EUROPA 
ISLAND, AND HAD TRACKED WEST-SOUTHWESTWARD AT 15 KNOTS OVER THE PAST 
SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 45 
KNOTS GUSTING TO 55 KNOTS. SEE REF A (WTXS31 PGTW 232100) FOR 
FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) AN AREA OF CONVECTION (INVEST 99S) HAS PERSISTED NEAR 
12.7S 128.4E, APPROXIMATELY 143 NM WEST OF DARWIN, AUSTRALIA.. 
ANIMATED ENHANCED INFRARED SATELLITE IMAGERY AND A 231030Z SSMIS 
91GHZ IMAGE REVEAL A FLARING, DEEP CONVECTIVE BURST OF A SLOW, 
ANTICYCLONICALLY TURNING MASS. ENVIRONMENTAL ANALYSIS REVEALS THAT 
THE INVEST IS IN A MARGINALLY FAVORABLE ENVIRONMENT FOR DEVELOPMENT 
DEFINED BY PRONOUNCED EQUATORWARD OUTFLOW, FAVORABLE (10-15KTS) 
VERTICAL WIND SHEAR, AND WARM (30-31) SEA SURFACE TEMPERATURES. 
SURFACE OBSERVATIONS FROM PT. FAWCETT IN THE TIMOR SEA RECORDED 
SUSTAINED 18KT NORTHERLY WINDS. GLOBAL MODELS ARE IN AGREEMENT 
REGARDING THE INTENSIFICATION AND GENERALLY QUASISTATIONARY MOVEMENT 
OF 99S OVER THE NEXT 24-48 HOURS. MAXIMUM SUSTAINED SURFACE WINDS 
ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS 
ESTIMATED TO BE NEAR 1006 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A 
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW.
      (2) AN AREA OF CONVECTION (INVEST 90S) HAS PERSISTED NEAR 
12.8S 96.8E, APPROXIMATELY 37 NM SOUTH OF COCOS ISLANDS.  ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY DEPICTS STRONG DEEP CONVECTION OVER 
A DEVELOPING LOW LEVEL CIRCULATION. THE ENVIRONMENT IS MARGINAL FOR 
DEVELOPMENT WITH MODERATE TO HIGH (15-20KTS) VERTICAL WIND SHEAR, 
AND WEAK OUTFLOW ALOFT OFFSET BY WARM (28-29C) SEA SURFACE 
TEMPERATURES. GLOBAL MODELS ARE IN AGREEMENT THAT INVEST 90S WILL 
TRACK SOUTHWEST AS IT CONSOLIDATES AND INTENSIFIES TO WARNING 
CRITERIA. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 10 TO 15 
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 LOW.
      (3) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: UPGRADED AREA IN 2.B.(2) TO LOW.//
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