WTPN32 PGTW 230300 1. TYPHOON 18W (BILIS) WARNING NR 020 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 230000Z5 --- NEAR 24.3N9 118.8E8 MOVEMENT PAST SIX HOURS - 285 DEGREES AT 18 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 120 KT, GUSTS 145 KT RADIUS OF 100 KT WINDS - 030 NM OVER WATER RADIUS OF 050 KT WINDS - 090 NM OVER WATER 030 NM ELSEWHERE RADIUS OF 035 KT WINDS - 160 NM NORTHEAST SEMICIRCLE OVER WATER 140 NM ELSEWHERE OVER WATER REPEAT POSIT: 24.3N9 118.8E8 --- FORECASTS: 12 HRS, VALID AT: 231200Z8 --- 25.6N3 117.6E5 MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT RADIUS OF 035 KT WINDS - 150 NM NORTHEAST SEMICIRCLE OVER WATER 125 NM ELSEWHERE OVER WATER VECTOR TO 24 HR POSIT: 320 DEG/ 08 KTS --- 24 HRS, VALID AT: 240000Z6 --- 26.9N7 116.4E2 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 36 HR POSIT: 320 DEG/ 04 KTS --- 36 HRS, VALID AT: 241200Z9 --- 27.5N4 115.8E5 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 48 HR POSIT: 320 DEG/ 04 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 250000Z7 --- 28.1N1 115.2E9 MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 230300Z8 POSITION NEAR 24.6N2 118.5E5. TYPHOON (TY) 18W (BILIS), LOCATED APPROXIMATELY 154 NM WEST- SOUTHWEST OF TAIPEI, TAIWAN, HAS TRACKED WEST-NORTHWESTWARD AT 18 KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 222330Z2 VISIBLE AND INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 115 AND 127 KNOTS. ANIMATED SATELLITE IMAGERY INDICATES THAT TY 18W HAS WEAKENED OVER THE PAST SIX HOURS AS IT HAS MOVED OFF OF TAIWAN AND INTO THE TAIWAN STRAIT. ANIMATED WATER VAPOR IMAGERY DEPICTS OUTFLOW IN THE NORTHWESTERN QUADRANT IS BEGINNING TO BE HINDERED BY AN APPROACHING MID-LATITUDE TROUGH. THE UW-CIMSS ANALYSIS AND THE 200 MB ANALYSIS INDICATE THAT TY 18W (BILIS) IS EXPERIENCING INCREASED VERTICAL WIND SHEAR IN THE NORTHWESTERN QUADRANT. TY 18W (BILIS) IS FORECAST TO TRACK NORTHWESTWARD THROUGH THE 48 HOUR FORECAST PERIOD UNDER THE STEERING INFLUENCE OF THE MID-LEVEL RIDGE TO THE NORTHEAST. THE SYSTEM IS EXPECTED TO MAKE LANDFALL WITHIN THE NEXT 6 HOURS AND BEGIN WEAKENING AND DISSIPATE OVER LAND BY THE END OF THE PERIOD. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 230000Z5 IS 30 FEET. REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 230900Z4 (DTG 230752Z9), 231500Z1 (DTG 231352Z6), 232100Z8 (DTG 231952Z2) AND 240300Z9 (DTG 240152Z4). REFER TO TROPICAL DEPRESSION 19W (KAEMI) WARNINGS (WTPN31 PGTW) FOR SIX- HOURLY UPDATES.// NNNN