ABIO10 PGTW 171200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN 
REISSUED/171200Z-171800ZJAN2025//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/170751ZJAN2025//
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 17JAN25 0600Z, TROPICAL CYCLONE 07S (DIKELEDI) WAS 
LOCATED NEAR 33.7S 54.8E, APPROXIMATELY 792 NM SOUTH OF ST DENIS, AND 
HAD TRACKED EAST-SOUTHEASTWARD AT 28 KNOTS OVER THE PAST SIX HOURS. 
MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 50 KNOTS GUSTING TO 
65 KNOTS. SEE REF A (WTXS31 PGTW 170900) FOR FURTHER DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 90S) PREVIOUSLY LOCATED NEAR 
17.2S 112.6E IS NOW LOCATED NEAR 15.8S 120.0E, APPROXIMATELY 187 NM 
NORTHWEST OF BROOME, AUSTRALIA. ANIMATED ENHANCED INFRARED SATELLITE 
IMAGERY AND AN AMSR2 GW1 36GHZ MICROWAVE SATELLITE IMAGERY DEPICT 
FRAGMENTED CLOUD BANDS TO THE NORTH, WITH A SLOWLY CONSOLIDATING LOW 
LEVEL CIRCULATION CENTER (LLCC) AND FLARING CONVECTION TO THE 
NORTHEAST. THE BROAD CIRCULATION HAS BEEN IDENTIFIED BETWEEN TWO 
COALESCING LOW- TO MID-LEVEL AND SEPARATE VORTICES. A PARTIAL 171022Z 
METOP-B ASCAT SCATTEROMETRY PASS REVEALS AN ASYMMETRIC WIND FIELD 
IDENTIFIED BY A SWATH OF 15-20 KNOTS IN THE NORTH-NORTHEAST QUADRANT 
AND AN AREA OF ELEVATED WINDS (20-25 KNOTS) APPROXIMATELY 200 NM 
NORTH-NORTHEAST OF THE LLCC. ENVIRONMENTAL ANALYSIS INDICATES INVEST 
90S IS IN A FAVORABLE ENVIRONMENT FOR FURTHER DEVELOPMENT DUE TO VERY 
WARM (30-31C) SEA SURFACE TEMPERATURES, LOW (LESS THAN 15 KNOTS) 
VERTICAL WIND SHEAR, AND GOOD POLEWARD OUTFLOW ALOFT. GLOBAL MODELS 
AND THE GFS AND ECMWF ENSEMBLE MODELS ARE IN GOOD AGREEMENT THAT 90S 
WILL CONTINUE TO SLOWLY CONSOLIDATE OVER THE NEXT 24 HOURS AND TRACK 
TO THE WEST-SOUTHWEST. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED 
AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 
998 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL 
CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO MEDIUM.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: UPGRADED AREA IN PARA 2.B.(1) TO 
MEDIUM.//
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