WTXS31 PGTW 131500 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 18S (ILSA) WARNING NR 020// RMKS/ 1. TROPICAL CYCLONE 18S (ILSA) WARNING NR 020 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 131200Z --- NEAR 19.5S 119.1E MOVEMENT PAST SIX HOURS - 155 DEGREES AT 09 KTS POSITION ACCURATE TO WITHIN 015 NM POSITION BASED ON EYE FIXED BY A COMBINATION OF SATELLITE, RADAR AND SYNOPTIC DATA PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 130 KT, GUSTS 160 KT WIND RADII VALID OVER OPEN WATER ONLY RADIUS OF 064 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 035 NM NORTHWEST QUADRANT RADIUS OF 050 KT WINDS - 075 NM NORTHEAST QUADRANT 075 NM SOUTHEAST QUADRANT 055 NM SOUTHWEST QUADRANT 070 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT 105 NM SOUTHEAST QUADRANT 090 NM SOUTHWEST QUADRANT 105 NM NORTHWEST QUADRANT REPEAT POSIT: 19.5S 119.1E --- FORECASTS: 12 HRS, VALID AT: 140000Z --- 21.0S 121.5E MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT WIND RADII VALID OVER OPEN WATER ONLY VECTOR TO 24 HR POSIT: 110 DEG/ 19 KTS --- 24 HRS, VALID AT: 141200Z --- 22.2S 125.4E MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 36 HR POSIT: 095 DEG/ 23 KTS --- 36 HRS, VALID AT: 150000Z --- 22.7S 130.4E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 131500Z POSITION NEAR 19.9S 119.7E. 13APR23. TROPICAL CYCLONE 18S (ILSA), LOCATED APPROXIMATELY 327 NM EAST-NORTHEAST OF LEARMONTH, AUSTRALIA, HAS TRACKED SOUTH- SOUTHEASTWARD AT 09 KNOTS OVER THE PAST SIX HOURS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 131200Z IS 50 FEET. NEXT WARNINGS AT 132100Z, 140300Z, 140900Z AND 141500Z.// NNNN