WTPN31 PGTW 140900 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL DEPRESSION 18W WARNING NR 002 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 140600Z1 --- NEAR 16.4N1 142.6E3 MOVEMENT PAST SIX HOURS - 340 DEGREES AT 13 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT REPEAT POSIT: 16.4N1 142.6E3 --- FORECASTS: 12 HRS, VALID AT: 141800Z4 --- 18.4N3 140.7E2 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT VECTOR TO 24 HR POSIT: 315 DEG/ 15 KTS --- 24 HRS, VALID AT: 150600Z2 --- 20.5N7 138.4E6 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 090 NM SOUTHWEST QUADRANT 100 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 315 DEG/ 17 KTS --- 36 HRS, VALID AT: 151800Z5 --- 22.9N3 135.9E8 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 034 KT WINDS - 105 NM NORTHEAST QUADRANT 110 NM SOUTHEAST QUADRANT 100 NM SOUTHWEST QUADRANT 110 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 320 DEG/ 20 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 160600Z3 --- 25.8N5 133.0E7 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT RADIUS OF 050 KT WINDS - 025 NM RADIUS OF 034 KT WINDS - 115 NM NORTHEAST QUADRANT 120 NM SOUTHEAST QUADRANT 110 NM SOUTHWEST QUADRANT 120 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 335 DEG/ 12 KTS --- 72 HRS, VALID AT: 170600Z4 --- 30.0N3 130.8E2 MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT RADIUS OF 050 KT WINDS - 030 NM RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT OVER WATER 110 NM SOUTHEAST QUADRANT 115 NM SOUTHWEST QUADRANT 110 NM NORTHWEST QUADRANT OVER WATER --- REMARKS: 140900Z4 POSITION NEAR 16.9N6 142.1E8. TROPICAL DEPRESSION (TD) 18W, LOCATED APPROXIMATELY 220 NM NORTHWEST OF GUAM, HAS TRACKED NORTH-NORTHWESTWARD AT 13 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 140530Z3 MULTISPECTRAL SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 25 KNOTS. ORGANIZATION OF TD 18W HAS IMPROVED OVER THE PAST 24 HOURS AND CONSOLIDATED SLIGHTLY POLEWARD OF PREVIOUS FIXES. RECENT AMSU-B MICROWAVE IMAGERY INDICATES A PARTIALLY EXPOSED LOW LEVEL CIRCULATION CENTER, WITH MINIMAL ASSOCIATED CONVECTION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 140600Z IS 14 FEET. REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 141500Z1, 142100Z8, 150300Z9 AND 150900Z5.// NNNN