WTPN31 PGTW 031500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 04W (CHOI-WAN) WARNING NR 020// RMKS/ 1. TROPICAL STORM 04W (CHOI-WAN) WARNING NR 020 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 031200Z --- NEAR 18.6N 118.2E MOVEMENT PAST SIX HOURS - 350 DEGREES AT 11 KTS POSITION ACCURATE TO WITHIN 050 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT 060 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT REPEAT POSIT: 18.6N 118.2E --- FORECASTS: 12 HRS, VALID AT: 040000Z --- 20.3N 118.8E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 060 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 040 DEG/ 13 KTS --- 24 HRS, VALID AT: 041200Z --- 22.3N 120.7E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 020 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 045 DEG/ 17 KTS --- 36 HRS, VALID AT: 050000Z --- 24.7N 123.3E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 48 HR POSIT: 050 DEG/ 22 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 051200Z --- 27.6N 127.1E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL VECTOR TO 72 HR POSIT: 055 DEG/ 23 KTS --- 72 HRS, VALID AT: 061200Z --- 32.4N 136.1E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 031500Z POSITION NEAR 19.0N 118.4E. 03JUN21. TROPICAL STORM 04W (CHOI-WAN), LOCATED APPROXIMATELY 289 NM NORTH-NORTHWEST OF MANILA, PHILIPPINES, HAS TRACKED NORTHWARD AT 11 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 031200Z IS 14 FEET. NEXT WARNINGS AT 032100Z, 040300Z, 040900Z AND 041500Z.// NNNN