ABPW10 PGTW 110600 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH PACIFIC OCEANS/110600Z-120600ZMAR2023// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/102321ZMAR2023// AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.// 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: NONE. B. TROPICAL DISTURBANCE SUMMARY: (1) THE AREA OF CONVECTION (INVEST 99P) PREVIOUSLY LOCATED NEAR 19.4S 167.1W IS NOW LOCATED NEAR 20.7S 164.6W, APPROXIMATELY 307 NM EAST-SOUTHEAST OF NIUE. ANIMATED MULTISPECTRAL IMAGERY DEPICTS A BROAD LOW-LEVEL CIRCULATION (LLC) PARTIALLY OBSCURED BY DEEP CONVECTION IN THE EASTERN SEMICIRCLE. AN 110432Z SSMIS 91GHZ IMAGE REVEALS FORMATIVE BANDING WRAPPING INTO THE EASTERN QUADRANT OF THE LLC. A 102043Z ASCAT-B BULLSEYE PASS REVEALS AN ELONGATED CIRCULATION WITH A SWATH OF 25 TO 30 KNOT WINDS IN THE NORTHERN QUADRANT ASSOCIATED WITH THE FORMATIVE BANDING. INVEST 99P IS CURRENTLY EMBEDDED IN THE SPCZ AND IN A FAVORABLE ENVIRONMENT CHARACTERIZED BY LOW (5-10KT) VWS AND WARM (27-29C) SST. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT 99P WILL DEVELOP GRADUALLY AS IT TRACKS EAST-SOUTHEASTWARD OVER THE NEXT 24-48 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 25 TO 30 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1000 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS HIGH. SEE REF A (WTPS21 PGTW 102330) FOR FURTHER DETAILS. (2) NO OTHER SUSPECT AREAS. C. SUBTROPICAL SYSTEM SUMMARY: NONE.// NNNN