ABPW10 PGTW 150600 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND /SOUTH PACIFIC OCEANS/150600Z-160600ZOCT2020// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/140751ZOCT2020// REF/B/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/140651ZOCT2020// NARR/REF A IS A TROPICAL CYCLONE WARNING. REF B IS A TROPICAL /CYCLONE FORMATION ALERT.// RMKS/ 1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA): A. TROPICAL CYCLONE SUMMARY: (1) AT 14OCT20 0600Z, TROPICAL STORM 18W (NANGKA) WAS LOCATED NEAR 20.2N 106.5E, APPROXIMATELY 59 NM SOUTHEAST OF HANOI, VIETNAM, AND HAD TRACKED WEST-NORTHWESTWARD AT 11 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 35 KNOTS GUSTING TO 45 KNOTS. SEE REF A (WTPN33 PGTW 140900) FOR THE FINAL WARNING ON THIS SYSTEM. (2) NO OTHER TROPICAL CYCLONES. B. TROPICAL DISTURBANCE SUMMARY: (1) THE AREA OF CONVECTION (INVEST 94W) PREVIOUSLY LOCATED NEAR 12.9N 123.2E IS NOW LOCATED NEAR 14.6N 118.6E, APPROXIMATELY 135 NM WEST OF MANILA, PHILIPPINES. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS A SMALL, PARTIALLY EXPOSED LOW LEVEL CIRCULATION CENTER (LLCC) WITH FLARING DEEP CONVECTION BEING SHEARED TO THE WEST- SOUTHWEST. A 150108Z METOP-A ASCAT PASS REVEALS A TIGHT CIRCULATION EMBEDDED IN THE LARGER CONVERGENT AREA WITH A SMALL SWATH OF 20 TO 25 KNOT WINDS TO THE EAST. 94W IS CURRENTLY IN A MARGINAL ENVIRONMENT WITH GENERALLY STRAIGHT-LINE FLOW PROVIDED MODERATE OUTFLOW AND MODERATE (20 TO 25 KNOT) VERTICAL WIND SHEAR. SEA SURFACE TEMPERATURES ARE CONDUCIVE AT 29 TO 30 CELSIUS. GLOBAL MODELS ARE IN GOOD AGREEMENT THAT 94W WILL TRACK GENERALLY WEST, ACROSS THE SOUTH CHINA SEA, WITH MINIMAL INTENSIFICATION. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 1005 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS HIGH. SEE REF B (WTPN21 PGTW 140700) 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