ABPW10 PGTW 110600 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND /SOUTH PACIFIC OCEANS/110600Z-120600ZDEC2020// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/110153ZDEC2020// AMPN/REF A IS A TROPICAL CYCLONE WARNING.// RMKS/ 1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA): A. TROPICAL CYCLONE SUMMARY: NONE. B. TROPICAL DISTURBANCE SUMMARY: NONE. C. SUBTROPICAL SYSTEM SUMMARY: NONE. 2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST): A. TROPICAL CYCLONE SUMMARY: (1) AT 11DEC20 0000Z, TROPICAL CYCLONE 04P (FOUR) WAS LOCATED NEAR 12.1S 179.9E, APPROXIMATELY 370 NM NORTH-NORTHEAST OF SUVA, FIJI, AND HAD TRACKED WEST-NORTHWESTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 35 KNOTS GUSTING TO 45 KNOTS. SEE REF A (WTPS33 PGTW 110300) FOR FURTHER DETAILS. (2) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: (1) THE AREA OF CONVECTION (INVEST 91P) PREVIOUSLY LOCATED NEAR 10.9S 170.4E IS NOW LOCATED NEAR 10.9S 170.4E, APPROXIMATELY 423 NM NORTH-NORTHEAST OF PORT VILA, VANUATU. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY AND AN 110151Z AMSR2 89GHZ MICROWAVE IMAGE DEPICT A PARTIALLY EXPOSED LOW LEVEL CIRCULATION CENTER WITH SOME FLARING CONVECTION IN THE NORTHEASTERN SEMICIRCLE. A 102032Z ASCAT-A PASS REVEALS AN ASYMMETRIC LLCC WITH 30 TO 35 KNOT WINDS TO THE EAST AND WEAKER (5-10KT) WINDS TO THE SOUTHWEST. INVEST 91P IS CURRENTLY IN A FAVORABLE ENVIRONMENT WITH STRONG OUTFLOW ALOFT, LOW TO MODERATE (10-20KTS) VERTICAL WIND SHEAR, AND WARM (29-30C) SEA SURFACE TEMPERATURES. GLOBAL MODELS ARE SOMEWHAT SPLIT WITH ECMWF AND UKMET SHOWING THAT INVEST 91P WILL TRACK SOUTHEASTWARD, BECOMING ABSORBED INTO TROPICAL CYCLONE 04P. GFS AND NAVGEM ARE SHOWING THAT INVEST 91P WILL BECOME THE DOMINANT CIRCULATION, INTENSIFYING AND EVENTUALLY ABSORBING TC 04P. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1001 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS MEDIUM. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE.// NNNN