WTPN32 PGTW 231500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 18W (NARRA) WARNING NR 012// RMKS/ 1. TROPICAL STORM 18W (NARRA) WARNING NR 012 03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 231200Z --- NEAR 20.5N 108.1E MOVEMENT PAST SIX HOURS - 180 DEGREES AT 01 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 - 020 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT REPEAT POSIT: 20.5N 108.1E --- FORECASTS: 12 HRS, VALID AT: 240000Z --- 20.2N 108.0E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 034 KT WINDS - 020 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 165 DEG/ 02 KTS --- 24 HRS, VALID AT: 241200Z --- 19.9N 108.1E 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 050 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 36 HR POSIT: 100 DEG/ 02 KTS --- 36 HRS, VALID AT: 250000Z --- 19.8N 108.6E 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 050 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 48 HR POSIT: 050 DEG/ 05 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 251200Z --- 20.5N 109.5E 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 030 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 60 HR POSIT: 020 DEG/ 05 KTS --- 60 HRS, VALID AT: 260000Z --- 21.4N 109.9E 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 72 HR POSIT: 005 DEG/ 05 KTS --- 72 HRS, VALID AT: 261200Z --- 22.3N 110.0E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 231500Z POSITION NEAR 20.4N 108.1E. 23AUG26. TROPICAL STORM 18W (NARRA), LOCATED APPROXIMATELY 127 NM EAST-SOUTHEAST OF HANOI, VIETNAM, HAS TRACKED SOUTHWARD AT 01 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 231200Z IS 992 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 231200Z IS 13 FEET. NEXT WARNINGS AT 232100Z, 240300Z, 240900Z AND 241500Z. REFER TO TYPHOON 17W (SAUDEL) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES. REFER TO TROPICAL DEPRESSION 19W (NINETEEN) WARNINGS (WTPN33 PGTW) FOR SIX-HOURLY UPDATES.// NNNN