ABPW10 PGTW 100600 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH PACIFIC OCEANS/100600Z-110600ZAPR2023// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/100221ZAPR2023// 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: (1) THE AREA OF CONVECTION (INVEST 90W) PREVIOUSLY LOCATED NEAR 10.6N 134.6E IS NOW LOCATED NEAR 10.0N 131.2E, APPROXIMATELY 471 NM EAST- SOUTHEAST OF LEGAZPI, PHILIPPINES. ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND 100416Z ATMS 88.2GHZ MICROWAVE IMAGE REVEAL A BROAD LOW-LEVEL CIRCULATION (LLC) WITH DISORGANIZED CONVECTION AND A MID-LEVEL SPINNER OFFSET TO THE NORTH OF THE LLC. A 100117Z ASCAT-B PASS REVEALS AN ELONGATED CIRCULATION ADJACENT TO 20-25 KNOT NORTHEASTERLY SURGE FLOW. ENVIRONMENTAL ANALYSIS REVEALS MARGINAL CONDITIONS FOR DEVELOPMENT WITH MODERATE POLEWARD OUTFLOW ALOFT AND WARM (29-30C) SST, OFFSET BY MODERATE TO HIGH (20-25KT) VWS. GLOBAL MODELS ARE IN AGREEMENT THAT 90W WILL GRADUALLY DEVELOP AS IT CONTINUES TO TRACK WEST-NORTHWESTWARD OVER THE NEXT 48 HOURS. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 24 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 HIGH. SEE REF A (WTPN21 PGTW 100230) FOR FURTHER DETAILS. (2) NO OTHER SUSPECT AREAS. 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: NONE. C. SUBTROPICAL SYSTEM SUMMARY: NONE.// NNNN