WTPN31 PGTW 121500 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI//JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL DEPRESSION 01W WARNING NR 004 DOWNGRADED FROM TROPICAL STORM 01W 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 121200Z6 --- NEAR 12.6N9 140.6E1 MOVEMENT PAST SIX HOURS - 305 DEGREES AT 12 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: 12.6N9 140.6E1 --- FORECASTS: 12 HRS, VALID AT: 130000Z4 --- 13.5N9 138.4E6 MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 035 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 295 DEG/ 09 KTS --- 24 HRS, VALID AT: 131200Z7 --- 14.3N8 136.7E7 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 295 DEG/ 08 KTS --- 36 HRS, VALID AT: 140000Z5 --- 15.0N6 135.2E1 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 065 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 310 DEG/ 07 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 141200Z8 --- 15.9N5 134.0E8 MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 034 KT WINDS - 065 NM VECTOR TO 72 HR POSIT: 330 DEG/ 06 KTS --- 72 HRS, VALID AT: 151200Z9 --- 18.0N9 132.7E3 MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT RADIUS OF 034 KT WINDS - 060 NM --- REMARKS: 121500Z9 POSITION NEAR 12.8N1 140.0E5. TROPICAL DEPRESSION (TD) 01W, LOCATED APPROXIMATELY 240 NM WEST OF AGANA, GUAM, HAS TRACKED WEST-NORTHWESTWARD AT 12 KNOTS OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 121130Z8 ENHANCED INFRARED SATELLITE IMAGERY. WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 25, 30, AND 35 KNOTS. RECENT ANIMATED INFRARED SATELLITE IMAGERY INDICATES THE DEEP CONVECTION HAS WEAKENED OVER THE LOW LEVEL CIRCULATION CENTER (LLCC). UPPER LEVEL ANALYSIS SHOWS MODERATE POLEWARD DIFFLUENCE AND WEAK VERTICAL WIND SHEAR. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 121200Z6 IS 14 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. ALTERNATE JTWC, FNMOC, MONTEREY, CA (DSN 878-4503). NEXT WARNINGS AT 122100Z6, 130300Z7, 130900Z3 AND 131500Z0.// NNNN