ABIO10 PGTW 011800 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN OCEAN/011800Z-021800ZAPR2021// RMKS/ 1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF AFRICA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: (1) THE AREA OF CONVECTION (INVEST 90B) PREVIOUSLY LOCATED NEAR 8.8N 94.5E IS NOW LOCATED NEAR 10.4N 95.8E, APPROXIMATELY 212 NM NORTHWEST OF PHUKET, THAILAND. ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY AND A PARTIAL 011128Z SSMIS 91GHZ MICROWAVE IMAGE DEPICT A DISORGANIZED DISTURBANCE WITH FLARING CONVECTION AND AN EXPOSED, ELONGATED, POORLY DEFINED LOW LEVEL CIRCULATION (LLC). ENVIRONMENTAL ANALYSIS SHOWS INVEST 90B IS IN A MARGINAL ENVIRONMENT FOR DEVELOPMENT WITH WEAK RADIAL OUTFLOW ALOFT AND MODERATE (15-20 KNOTS) VERTICAL WIND SHEAR, OFFSET BY WARM (29-30C) SEA SURFACE TEMPERATURES. GLOBAL MODELS ARE IN GENERAL AGREEMENT THAT INVEST 90B WILL NOT SIGNIFICANTLY INTENSIFY AND WILL REMAIN BELOW TROPICAL STORM INTENSITY WHILE TRACKING NORTH-NORTHEASTWARD. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS LOW. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE. 2. SOUTH INDIAN OCEAN AREA (135E WEST TO COAST OF AFRICA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: NONE. C. SUBTROPICAL SYSTEM SUMMARY: NONE.// NNNN