ABIO10 PGTW 051800
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN 
OCEAN/051800Z-061800ZAPR2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/051352ZAPR2021//
REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/051351ZAPR2021//
NARR/REFS A AND B ARE TROPICAL CYCLONE WARNINGS.//
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 05APR21 1200Z, TROPICAL CYCLONE 27S (TWENTYSEVEN) WAS 
LOCATED NEAR 16.0S 105.3E, APPROXIMATELY 626 NM NORTHWEST OF 
LEARMONTH, AUSTRALIA, AND HAD TRACKED SOUTHEASTWARD AT 06 KNOTS OVER 
THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED 
AT 45 KNOTS GUSTING TO 55 KNOTS. SEE REF A (WTXS32 PGTW 051500) FOR 
FURTHER DETAILS.
      (2) AT 05APR21 1200Z, TROPICAL CYCLONE 26S (SEROJA) WAS 
LOCATED NEAR 11.2S 121.5E, APPROXIMATELY 404 NM NORTH OF BROOME, 
AUSTRALIA, AND HAD TRACKED WEST-SOUTHWESTWARD AT 04 KNOTS OVER THE 
PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 50 
KNOTS GUSTING TO 65 KNOTS. SEE REF B (WTXS31 PGTW 051500) FOR 
FURTHER DETAILS.
      (3) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
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