ABIO10 PGTW 181800 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN/181800Z-191800ZJAN2024// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/180751ZJAN2024// REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/181351ZJAN2024// 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 18JAN24 0600Z, TROPICAL CYCLONE 06S (ANGGREK) WAS LOCATED NEAR 11.5S 93.8E, APPROXIMATELY 185 NM WEST-NORTHWEST OF THE COCOS ISLANDS, AND HAD TRACKED SOUTH- SOUTHWESTWARD AT 03 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 45 KNOTS GUSTING TO 55 KNOTS. SEE REF A (WTXS32 PGTW 180900) FOR FURTHER DETAILS. (2) AT 18JAN24 1200Z, TROPICAL CYCLONE 05S (BELAL) WAS LOCATED NEAR 23.9S 65.6E, APPROXIMATELY 515 NM EAST-SOUTHEAST OF PORT LOUIS, MAURITIUS, AND HAD TRACKED NORTHEASTWARD AT 03 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 45 KNOTS GUSTING TO 55 KNOTS. SEE REF B (WTXS31 PGTW 181500) FOR FURTHER DETAILS. (3) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: NONE. C. SUBTROPICAL SYSTEM SUMMARY: NONE. NNNN