WTPN31 PGTW 021500 1. TROPICAL STORM 08W (CHATAAN) WARNING NR 019 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 021200Z5 --- NEAR 7.5N2 151.6E3 MOVEMENT PAST SIX HOURS - 270 DEGREES AT 09 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 090 NM SOUTHEAST QUADRANT 120 NM SOUTHWEST QUADRANT 120 NM NORTHWEST QUADRANT REPEAT POSIT: 7.5N2 151.6E3 --- FORECASTS: 12 HRS, VALID AT: 030000Z3 --- 8.5N3 149.8E2 MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 090 NM SOUTHEAST QUADRANT 125 NM SOUTHWEST QUADRANT 125 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 320 DEG/ 11 KTS --- 24 HRS, VALID AT: 031200Z6 --- 10.2N3 148.3E6 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT RADIUS OF 050 KT WINDS - 030 NM RADIUS OF 034 KT WINDS - 095 NM NORTHEAST QUADRANT 095 NM SOUTHEAST QUADRANT 125 NM SOUTHWEST QUADRANT 125 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 305 DEG/ 11 KTS --- 36 HRS, VALID AT: 040000Z4 --- 11.5N7 146.5E6 MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT RADIUS OF 050 KT WINDS - 035 NM RADIUS OF 034 KT WINDS - 105 NM NORTHEAST QUADRANT 095 NM SOUTHEAST QUADRANT 125 NM SOUTHWEST QUADRANT 125 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 310 DEG/ 14 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 041200Z7 --- 13.4N8 144.3E2 MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT RADIUS OF 050 KT WINDS - 035 NM RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 115 NM SOUTHWEST QUADRANT 115 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 305 DEG/ 12 KTS --- 72 HRS, VALID AT: 051200Z8 --- 16.0N7 140.1E6 MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT RADIUS OF 050 KT WINDS - 045 NM RADIUS OF 034 KT WINDS - 125 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 125 NM SOUTHWEST QUADRANT 125 NM NORTHWEST QUADRANT --- REMARKS: 021500Z8 POSITION NEAR 7.8N5 151.1E8. TROPICAL STORM (TS) 08W (CHATAAN), LOCATED APPROXIMATELY 20 NM WEST OF CHUUK, HAS TRACKED WESTWARD AT 09 KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 021130Z7 INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 45 AND 55 KNOTS. A 021118Z3 SSM/I PASS SUGGESTS THAT THE LOW LEVEL CIRCULATION CENTER (LLCC) IS LOCATED ON THE EASTERN SIDE OF THE DEEP CONVECTION. ANIMATED SATELLITE IMAGERY INDICATES CYCLING, VERY DEEP CONVECTION OVER THE LLCC. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 021200Z5 IS 17 FEET. REFER TO WWPN31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 022100Z5, 030300Z6, 030900Z2 AND 031500Z9. REFER TO TROPICAL STORM 09W (RAMMASUN) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN