MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TYPHOON 20W (MEGI) WARNING NR 017 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 270000Z --- NEAR 23.1N 123.2E MOVEMENT PAST SIX HOURS - 310 DEGREES AT 13 KTS POSITION ACCURATE TO WITHIN 015 NM POSITION BASED ON EYE FIXED BY A COMBINATION OF SATELLITE AND RADAR PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 064 KT WINDS - 045 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT RADIUS OF 050 KT WINDS - 120 NM NORTHEAST QUADRANT 110 NM SOUTHEAST QUADRANT 075 NM SOUTHWEST QUADRANT 100 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 250 NM NORTHEAST QUADRANT 250 NM SOUTHEAST QUADRANT 170 NM SOUTHWEST QUADRANT 215 NM NORTHWEST QUADRANT REPEAT POSIT: 23.1N 123.2E --- FORECASTS: 12 HRS, VALID AT: 271200Z --- 23.9N 120.9E MAX SUSTAINED WINDS - 075 KT, GUSTS 090 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 24 HR POSIT: 290 DEG/ 11 KTS --- 24 HRS, VALID AT: 280000Z --- 24.7N 118.6E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 36 HR POSIT: 280 DEG/ 08 KTS --- 36 HRS, VALID AT: 281200Z --- 24.9N 116.9E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 48 HR POSIT: 270 DEG/ 06 KTS --- EXTENDED OUTLOOK: 48 HRS, VALID AT: 290000Z --- 24.9N 115.6E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 270300Z POSITION NEAR 23.3N 122.6E. TYPHOON 20W (MEGI), LOCATED APPROXIMATELY 152 NM SOUTHEAST OF TAIPEI, TAIWAN, HAS TRACKED NORTHWESTWARD AT 13 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 270000Z IS 36 FEET. NEXT WARNINGS AT 270900Z, 271500Z, 272100Z AND 280300Z.// NNNN NNNN