WTPN33 PGTW 301500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 20W (BANG-LANG) WARNING NR 018// RMKS/ 1. TROPICAL STORM 20W (BANG-LANG) WARNING NR 018 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 301200Z --- NEAR 34.1N 165.9E MOVEMENT PAST SIX HOURS - 305 DEGREES AT 14 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT REPEAT POSIT: 34.1N 165.9E --- FORECASTS: 12 HRS, VALID AT: 310000Z --- 36.2N 165.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT 060 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 015 DEG/ 16 KTS --- 24 HRS, VALID AT: 311200Z --- 39.4N 166.3E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 301500Z POSITION NEAR 34.6N 165.8E. 30AUG26. TROPICAL STORM 20W (BANG-LANG), LOCATED APPROXIMATELY 889 NM NORTH OF WAKE ISLAND, HAS TRACKED NORTHWESTWARD AT 14 KNOTS OVER THE PAST SIX HOURS. THE SYSTEM HAS CONTINUED TO RAPIDLY WEAKEN AS IT INTERACTS WITH TROPICAL DEPRESSION 21W LOCATED 180 NM TO THE SOUTH. DEEP CONVECTION PERSISTS ALONG THE NORTHERN AND EASTERN PERIPHERY. THE SYSTEM WILL UNDERGO SUBTROPICAL TRANSITION AS IT TRAVERSES SEA SURFACE TEMPERATURES BELOW 26 DEGREES CELSIUS, WHILE AN UPPER-LEVEL TROUGH RESIDES OVERHEAD. AS THE PROXIMITY TO TD 21W INCREASES, AN EXTENSIVE RIDGE CENTERED EAST OF THE DATELINE WILL PULL THE SYSTEM NORTHWARD OVER COOLER WATERS AND INTO A MORE BAROCLINIC ENVIRONMENT. THE FORECAST CALLS FOR SLOW WEAKENING AS CONVECTION PERSISTS DUE TO A COLDER TROPOPAUSE AND STRONG POLEWARD OUTFLOW ALOFT. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL PRESSURE AT 301200Z IS 993 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 301200Z IS 12 FEET. REFER TO TROPICAL DEPRESSION 21W (ETAU) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN