ABPW10 PGTW 010600 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND /SOUTH PACIFIC OCEANS/010600Z-020600ZJUN2021// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/010151ZJUN2021// AMPN/REF A IS A TROPICAL CYCLONE WARNING.// RMKS/ 1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA) : A. TROPICAL CYCLONE SUMMARY: (1) AT 01JUN21 0000Z, TROPICAL STORM 04W (CHOI-WAN) WAS LOCATED NEAR 10.1N 127.3E, APPROXIMATELY 457 NM SOUTHEAST OF MANILA, PHILIPPINES, AND HAD TRACKED WEST- NORTHWESTWARD AT 09 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 40 KNOTS GUSTING TO 50 KNOTS. SEE REF A (WTPN31 PGTW 010300) FOR FURTHER DETAILS. (2) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: (1) AN AREA OF CONVECTION (INVEST 90W) HAS PERSISTED NEAR 11.3N 140.3E, APPROXIMATELY 278 NM WEST-SOUTHWEST OF GUAM. ANIMATED MULTISPECTRAL SATELLITE IMAGERY AND A 010400Z AMSR2 89GHZ MICROWAVE IMAGE DEPICT BROAD AREA OF TURNING OBSCURED BY FLARING CONVECTION THAT IS BEING SHEARED TO THE SOUTHWEST. FURTHERMORE, A 010004Z METOP- B ASCAT IMAGE FURTHER EMPHASIZES THE BROAD NATURE OF 90W WITH POTENTIAL MULTIPLE CENTERS OF CIRCULATION EMBEDDED WITHIN THE BROADER OVERALL ROTATION. THE POSITION IS BASED ON THE CENTROID OF THE BROADER CIRCULATION AND THE SMALLER EMBEDDED FEATURES. UPPER LEVEL ANALYSIS INDICATES 90W IS IN A FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH LOW TO MODERATE (10-20 KNOT) VWS OFFSET, GOOD DIVERGENCE ALOFT, AND WARM (28-30C) SEA SURFACE TEMPERATURES. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT 90W WILL CONTINUE TO TRACK GENERALLY NORTHWESTWARD AND THOUGH OVERALL CONDITIONS ARE FAVORABLE, THE LACK OF A DISTINCT, CONSOLIDATED LLCC AT THIS TIME WILL SERVE TO LIMIT THE POTENTIAL DEVELOPMENT. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 15 TO 20 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1006 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO LOW. (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