WTPN31 PGTW 161500 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL STORM 18W (MEGI) WARNING NR 011 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 161200Z0 --- NEAR 19.7N7 129.5E7 MOVEMENT PAST SIX HOURS - 310 DEGREES AT 16 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT REPEAT POSIT: 19.7N7 129.5E7 --- FORECASTS: 12 HRS, VALID AT: 170000Z8 --- 21.9N2 127.6E6 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 325 DEG/ 14 KTS --- 24 HRS, VALID AT: 171200Z1 --- 24.2N8 125.8E6 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT 080 NM SOUTHEAST QUADRANT 080 NM SOUTHWEST QUADRANT 080 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 330 DEG/ 13 KTS --- 36 HRS, VALID AT: 180000Z9 --- 26.5N3 124.3E0 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT 090 NM SOUTHEAST QUADRANT 090 NM SOUTHWEST QUADRANT 090 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 345 DEG/ 10 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 181200Z2 --- 28.5N5 123.7E3 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT RADIUS OF 050 KT WINDS - 020 NM RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 105 NM SOUTHEAST QUADRANT 105 NM SOUTHWEST QUADRANT 090 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 025 DEG/ 06 KTS --- 72 HRS, VALID AT: 191200Z3 --- 30.7N0 124.8E5 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT 085 NM SOUTHEAST QUADRANT 100 NM SOUTHWEST QUADRANT 085 NM NORTHWEST QUADRANT VECTOR TO 96 HR POSIT: 060 DEG/ 13 KTS --- LONG RANGE OUTLOOK: NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 250 NM ON DAY 4 AND 350 NM ON DAY 5... AND FOR INTENSITY NEAR 20 KT EACH DAY. --- 96 HRS, VALID AT: 201200Z5 --- 33.0N6 130.3E7 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT BECOMING EXTRATROPICAL VECTOR TO 120 HR POSIT: 065 DEG/ 27 KTS --- 120 HRS, VALID AT: 211200Z6 --- 36.9N8 142.5E2 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT EXTRATROPICAL --- REMARKS: 161500Z3 POSITION NEAR 20.2N4 129.0E2. TROPICAL STORM (TS) 18W, LOCATED APPROXIMATELY 380 NM SOUTH-SOUTHEAST OF OKINAWA, JAPAN, HAS TRACKED NORTHWESTWARD AT 16 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 161130Z2 ENHANCED INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 35 AND 45 KNOTS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 161200Z0 IS 16 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 162100Z0, 170300Z1, 170900Z7 AND 171500Z4.// NNNN