WTPS31 PGTW 051500 MSGID/GENADMIN/NAVMARFCSTCEN PEARL HARBOR HI/JTWC// SUBJ/TROPICAL CYCLONE 25P (LIN) WARNING NR 004// RMKS/ 1. TROPICAL CYCLONE 25P (LIN) WARNING NR 004 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE --- WARNING POSITION: 051200Z --- NEAR 24.8S 174.3W MOVEMENT PAST SIX HOURS - 165 DEGREES AT 22 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 060 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 055 NM NORTHWEST QUADRANT REPEAT POSIT: 24.8S 174.3W --- FORECASTS: 12 HRS, VALID AT: 060000Z --- 29.3S 172.7W MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 051500Z POSITION NEAR 25.9S 173.9W. TC 25P (LIN), LOCATED APPROXIMATELY 630 NM SOUTHEAST OF NADI, FIJI, HAS TRACKED SOUTH-SOUTHEASTWARD AT 22 KNOTS OVER THE PAST O6 HOURS. ANIMATED INFRARED IMAGERY DEPICTS A LOW LEVEL CIRCULATION CENTER (LLCC) THAT HAS STARTED EXTRATROPICAL TRANSITION (ET), BECOMING ELONGATED TO THE SOUTHEAST. CURRENT INTENSITY ESTIMATES HAVE RAPIDLY DECREASED FOR THE SYSTEM AS THE CONVECTION ASSOCIATED WITH TC 25P HAS BECOME SHEARED FROM THE LLCC TO THE SOUTHEAST. RAPIDLY INCREASING VERTICAL WIND SHEAR ASSOCIATED WITH A LONG WAVE TROUGH SOUTHWEST OF LIN HAS BEEN THE PRIMARY FACTOR IN TC 25P UNDERGOING ET. SEA SURFACE TEMPERATURES HAVE CONTINUED TO DECREASE AS LIN CONTINUES TRACKING TO THE SOUTH-SOUTHEAST AND HAVE BECOME UNFAVORABLE FOR FURTHER DEVELOPMENT. THESE FACTORS, COUPLED WITH A STRONG BAROCLINIC BOUNDARY, WILL LEAD TO RAPID ET IN THE NEXT 12 HOURS. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVMARFCSTCEN). THE SYSTEM WILL BE CLOSELY MONI- TORED FOR SIGNS OF REGENERATION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 051200Z IS 17 FEET.//