WTPN31 PGTW 292100 SUBJ: TROPICAL CYCLONE WARNING 1. TROPICAL STORM 08W (CHATAAN) WARNING NR 008 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 291800Z0 --- NEAR 6.2N8 155.7E8 MOVEMENT PAST SIX HOURS - 360 DEGREES AT 04 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 055 NM SOUTHWEST QUADRANT 055 NM NORTHWEST QUADRANT REPEAT POSIT: 6.2N8 155.7E8 --- FORECASTS: 12 HRS, VALID AT: 300600Z9 --- 7.0N7 155.1E2 MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT RADIUS OF 050 KT WINDS - 020 NM RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 065 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 305 DEG/ 05 KTS --- 24 HRS, VALID AT: 301800Z2 --- 7.6N3 154.3E3 MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT RADIUS OF 050 KT WINDS - 030 NM RADIUS OF 034 KT WINDS - 085 NM NORTHEAST QUADRANT OVER WATER 065 NM SOUTHEAST QUADRANT 085 NM SOUTHWEST QUADRANT 085 NM NORTHWEST QUADRANT OVER WATER VECTOR TO 36 HR POSIT: 290 DEG/ 04 KTS --- 36 HRS, VALID AT: 010600Z7 --- 7.9N6 153.5E4 MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT RADIUS OF 050 KT WINDS - 035 NM RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT OVER WATER 075 NM SOUTHEAST QUADRANT 080 NM SOUTHWEST QUADRANT 090 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 295 DEG/ 06 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 011800Z0 --- 8.4N2 152.3E1 MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT RADIUS OF 050 KT WINDS - 040 NM RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT 080 NM SOUTHEAST QUADRANT 080 NM SOUTHWEST QUADRANT OVER WATER 100 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 295 DEG/ 06 KTS --- 72 HRS, VALID AT: 021800Z1 --- 9.4N3 150.1E7 MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT RADIUS OF 050 KT WINDS - 045 NM RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT 070 NM SOUTHEAST QUADRANT 080 NM SOUTHWEST QUADRANT 110 NM NORTHWEST QUADRANT --- REMARKS: 292100Z4 POSITION NEAR 6.4N0 155.6E7. TROPICAL STORM (TS) 08W (CHATAAN), LOCATED APPROXIMATELY 240 NM EAST-SOUTHEAST OF CHUUK, HAS DRIFTED NORTHWARD WITHIN THE MONSOON TROUGH AT 04 KNOTS OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON 291730Z2 ENHANCED INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 45 KNOTS AND SYNOPTIC DATA. ANIMATED WATER VAPOR IMAGERY REVEALS THAT AN UPPER LEVEL LOW CENTERED NEAR 22.7N1 152.7E5 CONTINUES TO PROVIDE FAVORABLE POLEWARD OUTFLOW. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 291800Z0 IS 15 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 300300Z6, 300900Z2, 301500Z9 AND 302100Z6. REFER TO TROPICAL STORM 09W (RAMMASUN) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN