WTXS31 PGTW 081500 2005039 1423 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL CYCLONE 17S (VIVIENNE) WARNING NR 004 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 081200Z1 --- NEAR 15.9S5 115.9E6 MOVEMENT PAST SIX HOURS - 360 DEGREES AT 01 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 15.9S5 115.9E6 --- FORECASTS: 12 HRS, VALID AT: 090000Z9 --- 15.7S3 115.9E6 MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 035 DEG/ 02 KTS --- 24 HRS, VALID AT: 091200Z2 --- 15.4S0 116.1E9 MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 081500Z4 POSITION NEAR 15.9S5 115.9E6. TROPICAL CYCLONE (TC) 17S (VIVIENNE), LOCATED APPROXIMATELY 310 NM NORTH-NORTHWEST OF PORT HEDLAND, AUSTRALIA, HAS TRACKED NORTH- WARD AT 01 KNOT OVER THE PAST 06 HOURS. THE WARNING POSITION IS BASED ON 081130Z3 ENHANCED INFRARED SATELLITE IMAGERY. THE WARN- ING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY ESTIMATES OF 35 KNOTS. A 081039Z1 SSM/I PASS INDICATES THAT THE LOW LEVEL CIRCULATION CENTER HAS BECOME FULLY EXPOSED. ANIMATED VISIBLE IMAGERY SHOWS THAT THE DEEP CONVECTION HAS WEAKENED SIGNIFICANTLY OVER THE PAST 12 HOURS. THE SYSTEM IS FORECAST TO DRIFT SLOWLY NORTHWARD WITHIN A WEAK STEERING ENVIRONMENT AND WEAKEN SLOWLY DUE TO MARGINAL VERTICAL WIND SHEAR CONDITIONS. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 081200Z1 IS 15 FEET. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVPACMETOCCEN). THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION.// wxtlist.k: done