WTPN31 PGTW 181500 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL DEPRESSION 16W (CHOI-WAN) WARNING NR 004 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 181200Z2 --- NEAR 22.5N9 126.9E8 MOVEMENT PAST SIX HOURS - 330 DEGREES AT 09 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT REPEAT POSIT: 22.5N9 126.9E8 --- FORECASTS: 12 HRS, VALID AT: 190000Z0 --- 23.8N3 126.1E0 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT 080 NM SOUTHEAST QUADRANT 055 NM SOUTHWEST QUADRANT 055 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 345 DEG/ 04 KTS --- 24 HRS, VALID AT: 191200Z3 --- 24.6N2 125.9E7 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 034 KT WINDS - 085 NM NORTHEAST QUADRANT 085 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 065 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 025 DEG/ 05 KTS --- 36 HRS, VALID AT: 200000Z2 --- 25.5N2 126.4E3 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT RADIUS OF 050 KT WINDS - 030 NM RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 090 NM SOUTHEAST QUADRANT 070 NM SOUTHWEST QUADRANT 080 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 050 DEG/ 09 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 201200Z5 --- 26.6N4 127.9E9 MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT RADIUS OF 050 KT WINDS - 040 NM OVER WATER RADIUS OF 034 KT WINDS - 125 NM NORTHEAST QUADRANT OVER WATER 125 NM SOUTHEAST QUADRANT 115 NM SOUTHWEST QUADRANT 125 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 055 DEG/ 10 KTS --- 72 HRS, VALID AT: 211200Z6 --- 28.7N7 131.7E2 MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT RADIUS OF 050 KT WINDS - 050 NM RADIUS OF 034 KT WINDS - 135 NM OVER WATER --- REMARKS: 181500Z5 POSITION NEAR 22.8N2 126.7E6. TROPICAL DEPRESSION (TD) 16W (CHOI-WAN), LOCATED APPROXIMATELY 230 NM SOUTH-SOUTHWEST OF NAHA, OKINAWA, HAS TRACKED NORTH- WESTWARD AT 09 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 181130Z4 ENHANCED INFRARED SATELLITE IMAGERY, AN 181121Z4 SSM/I PASS, AND AN 180946Z8 QUIKSCAT PASS. THE WARNING INTENSITY IS BASED SATELLITE CURRENT INTENSITY ESTIMATES OF 30 KNOTS. ANIMATED SATELLITE IMAGERY AND AN 181121Z4 SSM/I PASS INDICATE THAT A DEEP CONVECTIVE BAND HAS FORMED IN THE EASTERN SEMI-CIRCLE AND THE LOW LEVEL CIRCULATION CENTER IS BEGINNING TO CONSOLIDATE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 181200Z2 IS 12 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. THE NEXT WARNINGS ARE AT 182100Z2, 190300Z3, 190900Z9, AND 191500Z6.// NNNN