WTPN31 PGTW 210900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 04W (PRAPIROON) WARNING NR 007 // RMKS/ 1. TROPICAL STORM 04W (PRAPIROON) WARNING NR 007 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 210600Z --- NEAR 17.1N 111.0E MOVEMENT PAST SIX HOURS - 350 DEGREES AT 10 KTS POSITION ACCURATE TO WITHIN 030 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 - 045 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT REPEAT POSIT: 17.1N 111.0E --- FORECASTS: 12 HRS, VALID AT: 211800Z --- 18.6N 110.3E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 320 DEG/ 08 KTS --- 24 HRS, VALID AT: 220600Z --- 19.9N 109.2E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 020 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 060 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 325 DEG/ 06 KTS --- 36 HRS, VALID AT: 221800Z --- 20.8N 108.5E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 48 HR POSIT: 330 DEG/ 04 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 230600Z --- 21.5N 108.1E 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 72 HR POSIT: 325 DEG/ 02 KTS --- 72 HRS, VALID AT: 240600Z --- 22.2N 107.6E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 210900Z POSITION NEAR 17.5N 110.8E. 21JUL24. TROPICAL STORM 04W (PRAPIROON), LOCATED APPROXIMATELY 169 NM EAST-NORTHEAST OF DA NANG, VIETNAM, HAS TRACKED NORTHWARD AT 10 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 210600Z IS 997 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 210600Z IS 15 FEET. NEXT WARNINGS AT 211500Z, 212100Z, 220300Z AND 220900Z. REFER TO TROPICAL STORM 05W (GAEMI) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN