WTXS31 PGTW 202100 2006051 2023 MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL CYCLONE 12S WARNING NR 003 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 201800Z --- NEAR 19.2S 57.9E MOVEMENT PAST SIX HOURS - 335 DEGREES AT 02 KTS POSITION ACCURATE TO WITHIN 040 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 19.2S 57.9E --- FORECASTS: 12 HRS, VALID AT: 210600Z --- 19.0S 57.4E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER VECTOR TO 24 HR POSIT: 260 DEG/ 04 KTS --- 24 HRS, VALID AT: 211800Z --- 19.1S 56.6E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 202100Z POSITION NEAR 19.1S 57.8E. TROPICAL CYCLONE (TC) 12S, LOCATED APPROXIMATELY 175 NM NORTHEAST OF LA REUNION, HAS TRACKED NORTH-NORTHWESTWARD AT 02 KNOTS OVER THE PAST SIX HOURS. THE SYSTEM HAS SLOWED CONSIDERABLY OVER THE LAST 12 HOURS AS THE STEERING FLOW TRANSITIONS FROM A RIDGE TO THE NORTHEAST OF TC 12S TO A BUILDING LOW-LEVEL STEERING RIDGE TO THE SOUTH. THIS SOUTHERN STEERING RIDGE SHOULD TURN THE SHALLOW SYSTEM WESTWARD THROUGH THE FORECAST PERIOD. MOREOVER, THE CYCLONE HAS WEAKENED BELOW WARNING-LEVEL CRITERIA DUE TO AN UNFAVORABLE SHEAR ENVIRONMENT THAT HAS SEPARATED THE REMAINING CONVECTION NEARLY 90 NM FROM THE LOW LEVEL CIRCULATION CENTER. THE UPPER LEVEL ENVIRONMENT IS FORECAST TO REMAIN UNFAVORABLE FOR THE REGENERATION OF PERSISTENT DEEP CONVECTION OVER THE NEXT 24 HOURS. 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. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 201800Z IS 11 FEET.// wxtlist.k: done