WTPN31 PGTW 301500 1. TROPICAL STORM 08W (CHATAAN) WARNING NR 011 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 301200Z6 --- NEAR 5.7N2 156.4E6 MOVEMENT PAST SIX HOURS - 360 DEGREES AT 01 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 - 040 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 055 NM SOUTHWEST QUADRANT 055 NM NORTHWEST QUADRANT REPEAT POSIT: 5.7N2 156.4E6 --- FORECASTS: 12 HRS, VALID AT: 010000Z1 --- 6.0N6 156.2E4 MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT RADIUS OF 050 KT WINDS - 020 NM RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 065 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 310 DEG/ 06 KTS --- 24 HRS, VALID AT: 011200Z4 --- 6.7N3 155.3E4 MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT RADIUS OF 050 KT WINDS - 025 NM RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 080 NM SOUTHWEST QUADRANT 080 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 300 DEG/ 06 KTS --- 36 HRS, VALID AT: 020000Z2 --- 7.3N0 154.2E2 MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT RADIUS OF 050 KT WINDS - 030 NM RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 075 NM SOUTHEAST QUADRANT 085 NM SOUTHWEST QUADRANT OVER WATER 090 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 295 DEG/ 08 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 021200Z5 --- 8.0N8 152.7E5 MAX SUSTAINED WINDS - 080 KT, GUSTS 100 KT RADIUS OF 050 KT WINDS - 035 NM RADIUS OF 034 KT WINDS - 095 NM NORTHEAST QUADRANT 080 NM SOUTHEAST QUADRANT 085 NM SOUTHWEST QUADRANT 095 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 295 DEG/ 10 KTS --- 72 HRS, VALID AT: 031200Z6 --- 9.6N5 149.0E4 MAX SUSTAINED WINDS - 090 KT, GUSTS 110 KT RADIUS OF 050 KT WINDS - 045 NM RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT 075 NM SOUTHEAST QUADRANT 090 NM SOUTHWEST QUADRANT 110 NM NORTHWEST QUADRANT --- REMARKS: 301500Z9 POSITION NEAR 5.8N3 156.4E6. TROPICAL STORM (TS) 08W (CHATAAN), LOCATED APPROXIMATELY 270 NM EAST-SOUTHEAST OF CHUUK, HAS REMAINED QUASI-STATIONARY OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED ON RECENT MICROWAVE AND 300530Z1 INFRARED SATELLITE IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 45 AND 55 KNOTS. ANIMATED WATER VAPOR IMAGERY REVEALS THAT AN UPPER LEVEL LOW CENTERED NEAR 22.6N0 152.5E3 CONTINUES TO PROVIDE FAVORABLE POLEWARD OUTFLOW. A 300957Z4 SPECIAL SENSOR MICROWAVE IMAGE (SSM/I) PASS SHOWS THE LOW LEVEL CIRCULATION CENTER (LLCC) CONTINUES TO BE BROAD AND DISPLACED EAST OF THE DEEP CONVECTION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 301200Z6 IS 18 FEET. REFER TO WWPW31 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 302100Z6, 010300Z4, 010900Z0 AND 011500Z7. REFER TO TROPICAL STORM 09W (RAMMASUN) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN