ABIO10 PGTW 201800 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN /OCEAN/201800Z-211800ZFEB2021// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/201351ZFEB2021// 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 20FEB21 1200Z, TROPICAL CYCLONE 21S (GUAMBE) WAS LOCATED NEAR 26.5S 36.5E, APPROXIMATELY 154 NM SOUTH-SOUTHEAST OF MAXIXE, MOZAMBIQUE, AND HAD TRACKED SOUTH- SOUTHEASTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 65 KNOTS GUSTING TO 80 KNOTS. SEE REF A (WTXS31 PGTW 201500) FOR FURTHER DETAILS. (2) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: NONE. C. SUBTROPICAL SYSTEM SUMMARY: NONE.// NNNN