ABIO10 PGTW 270500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN 
REISSUED/270500Z-271800ZMAR2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/261951ZMAR2025//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/270451ZMAR2025//
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 26MAR25 1800Z, TROPICAL CYCLONE 27S (COURTNEY) WAS 
LOCATED NEAR 17.4S 102.2E, APPROXIMATELY 438 NM SOUTHEAST OF THE 
COCOS ISLANDS, AND HAD TRACKED WESTWARD AT 10 KNOTS OVER THE PAST SIX 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 70 KNOTS 
GUSTING TO 85 KNOTS. SEE REF A (WTXS31 PGTW 262100) FOR FURTHER 
DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 93S) PREVIOUSLY LOCATED NEAR 
14.9S 121.0E IS NOW LOCATED NEAR 13.8S 121.4E, APPROXIMATELY 252 NM 
NORTH OF BROOME, AUSTRALIA. ANIMATED MULTISPECTRAL SATELLITE IMAGERY 
DEPICTS A POORLY ORGANIZED AREA OF FLARING CONVECTION OVER A VERY 
WEAKLY DEFINED LOW LEVEL CIRCULATION CENTER (LLCC). ENVIRONMENTAL 
ANALYSIS DEPICTS FAVORABLE CONDITIONS FOR DUE TO LOW TO MODERATE (15-
20 KTS) VERTICAL WIND SHEAR, VERY WARM (30-31C) SEA SURFACE 
TEMPERATURES, AND A MODERATE EQUATORWARD OUTFLOW CHANNEL ALOFT. THE 
ECMWF ENSEMBLE IS CURRENTLY THE MOST AGGRESSIVE WITH GLOBAL 
DETERMINISTIC AND ENSEMBLE MODELS IN GOOD AGREEMENT ON A GENERALLY 
SOUTHWARD TRACK TOWARDS THE COAST OF AUSTRALIA OVER THE NEXT 24 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 
KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 997 MB. THE 
POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE 
WITHIN THE NEXT 24 HOURS IS UPGRADED TO HIGH. SEE REF B (WTXS21 PGTW 
270500) FOR FURTHER DETAILS.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: UPGRADED AREA IN PARA. 2.B.(1) TO 
HIGH.//
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