WTPN32 PGTW 240900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 18W (NARRA) WARNING NR 015// RMKS/ 1. TROPICAL STORM 18W (NARRA) WARNING NR 015 03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 240600Z --- NEAR 19.9N 107.3E MOVEMENT PAST SIX HOURS - 215 DEGREES AT 05 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 070 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT REPEAT POSIT: 19.9N 107.3E --- FORECASTS: 12 HRS, VALID AT: 241800Z --- 19.6N 107.5E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 070 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 085 DEG/ 04 KTS --- 24 HRS, VALID AT: 250600Z --- 19.7N 108.4E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 020 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 020 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 045 DEG/ 06 KTS --- 36 HRS, VALID AT: 251800Z --- 20.5N 109.3E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 48 HR POSIT: 025 DEG/ 06 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 260600Z --- 21.6N 109.8E 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 60 HR POSIT: 005 DEG/ 06 KTS --- 60 HRS, VALID AT: 261800Z --- 22.7N 109.9E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 240900Z POSITION NEAR 19.8N 107.3E. 24AUG26. TROPICAL STORM 18W (NARRA), LOCATED APPROXIMATELY 103 NM SOUTHEAST OF HANOI, VIETNAM, HAS TRACKED SOUTHWESTWARD AT 05 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 240600Z IS 989 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 240600Z IS 13 FEET. NEXT WARNINGS AT 241500Z, 242100Z, 250300Z AND 250900Z. REFER TO TYPHOON 17W (SAUDEL) WARNINGS (WTPN31 PGTW) FOR SIX- HOURLY UPDATES. REFER TO TROPICAL DEPRESSION 19W (ATSANI) WARNINGS (WTPN33 PGTW) FOR SIX-HOURLY UPDATES.// NNNN