WTPN31 PGTW 171500 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TYPHOON 25W (NEPARTAK) WARNING NR 021 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 171200Z1 --- NEAR 16.9N6 109.1E1 MOVEMENT PAST SIX HOURS - 310 DEGREES AT 08 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT 030 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT OVER WATER 065 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 100 NM NORTHWEST QUADRANT REPEAT POSIT: 16.9N6 109.1E1 --- FORECASTS: 12 HRS, VALID AT: 180000Z9 --- 17.7N5 108.3E2 MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT RADIUS OF 050 KT WINDS - 020 NM RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT OVER WATER 060 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 080 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 330 DEG/ 05 KTS --- 24 HRS, VALID AT: 181200Z2 --- 18.6N5 107.7E5 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 050 KT WINDS - 015 NM RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 075 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 330 DEG/ 04 KTS --- 36 HRS, VALID AT: 190000Z0 --- 19.3N3 107.3E1 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 355 DEG/ 04 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 191200Z3 --- 20.1N3 107.2E0 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT 045 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 015 DEG/ 06 KTS --- 72 HRS, VALID AT: 201200Z5 --- 22.4N8 107.9E7 MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 171500Z4 POSITION NEAR 17.1N9 108.9E8. TYPHOON (TY) 25W (NEPARTAK), LOCATED APPROXIMATELY 80 NM SOUTH OF HAINAN ISLAND, HAS TRACKED NORTHWESTWARD AT 08 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 171130Z3 ENHANCED INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 65 AND 77 KNOTS. ANIMATED ENHANCED WATER VAPOR IMAGERY REVEALS A SLIGHT INCREASE IN CONVECTION OVER THE LAST SIX HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 171200Z1 IS 16 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 172100Z1, 180300Z2, 180900Z8 AND 181500Z5.// NNNN