WTPN32 PGTW 230900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 21W (DIANMU) WARNING NR 004// RMKS/ 1. TROPICAL STORM 21W (DIANMU) WARNING NR 004 UPGRADED FROM TROPICAL DEPRESSION 21W 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 230600Z --- NEAR 14.3N 110.2E MOVEMENT PAST SIX HOURS - 310 DEGREES AT 13 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 - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT 000 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT REPEAT POSIT: 14.3N 110.2E --- FORECASTS: 12 HRS, VALID AT: 231800Z --- 15.4N 108.0E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 24 HR POSIT: 280 DEG/ 13 KTS --- 24 HRS, VALID AT: 240600Z --- 15.9N 105.4E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 36 HR POSIT: 270 DEG/ 11 KTS --- 36 HRS, VALID AT: 241800Z --- 15.9N 103.1E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 230900Z POSITION NEAR 14.6N 109.7E. 23SEP21. TROPICAL STORM 21W (DIANMU), LOCATED APPROXIMATELY 150 NM SOUTHEAST OF DA NANG, VIETNAM, HAS TRACKED NORTHWESTWARD AT 13 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 230600Z IS 12 FEET. NEXT WARNINGS AT 231500Z, 232100Z, 240300Z AND 240900Z. REFER TO TROPICAL STORM 20W (DIANMU) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES. // NNNN