WTPN31 PGTW 031500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL DEPRESSION 21W (TWENTYONE) WARNING NR 001// REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/021451ZSEP2025// AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.// RMKS/ 1. TROPICAL DEPRESSION 21W (TWENTYONE) WARNING NR 001 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 27.0N 131.6E MOVEMENT PAST SIX HOURS - 345 DEGREES AT 14 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE AND RADAR PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY REPEAT POSIT: 27.0N 131.6E --- FORECASTS: 12 HRS, VALID AT: 040000Z --- 30.0N 131.2E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 015 DEG/ 15 KTS --- 24 HRS, VALID AT: 041200Z --- 32.8N 132.1E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT 120 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 055 DEG/ 11 KTS --- 36 HRS, VALID AT: 050000Z --- 34.0N 134.2E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 130 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 070 DEG/ 12 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 051200Z --- 34.8N 136.9E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 130 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 72 HR POSIT: 085 DEG/ 15 KTS --- 72 HRS, VALID AT: 061200Z --- 35.2N 144.4E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 210 NM NORTHEAST QUADRANT 220 NM SOUTHEAST QUADRANT 190 NM SOUTHWEST QUADRANT 180 NM NORTHWEST QUADRANT --- REMARKS: 031500Z POSITION NEAR 27.8N 131.5E. 03SEP25. TROPICAL DEPRESSION 21W (TWENTYONE), LOCATED APPROXIMATELY 648 NM SOUTHWEST OF YOKOSUKA, JAPAN, HAS TRACKED NORTH-NORTHWESTWARD AT 14 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 031200Z IS 1002 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 031200Z IS 12 FEET. NEXT WARNINGS AT 032100Z, 040300Z, 040900Z AND 041500Z. 2. THIS CANCELS AND SUPERSEDES REF A (WTPN21 PGTW 021500).// NNNN