WTPS31 PGTW 292100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 18P (EIGHTEEN) WARNING NR 007// RMKS/ 1. TROPICAL CYCLONE 18P (EIGHTEEN) WARNING NR 007 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 291800Z --- NEAR 26.9S 171.9E MOVEMENT PAST SIX HOURS - 215 DEGREES AT 12 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 DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 120 NM SOUTHEAST QUADRANT 100 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT REPEAT POSIT: 26.9S 171.9E --- FORECASTS: 12 HRS, VALID AT: 300600Z --- 28.0S 170.6E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 292100Z POSITION NEAR 27.2S 171.6E. 29JAN26. TROPICAL CYCLONE 18P (EIGHTEEN), LOCATED APPROXIMATELY 262 NM NORTHEAST OF KINGSTON IS., HAS TRACKED SOUTHWESTWARD AT 12 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTI-SPECTRAL IMAGERY (MSI) DEPICTS TROPICAL CYCLONE 18P AS A FULLY EXPOSED AND SHALLOW VORTEX BEING STEERED BY THE LOWER LEVEL EASTERLIES. IT IS COMPLETELY DEVOID OF CONVECTION AND UPPER-LEVEL STRUCTURE AS IT TRACKS FARTHER SOUTHWESTWARD INTO A HOSTILE ENVIRONMENT CHARACTERIZED BY HIGH (30+ KTS) VERTICAL WIND SHEAR, DRY AIR, AND COOL (25-26 C) SEA SURFACE TEMPERATURES. MODEL GUIDANCE IS IN STRONG AGREEMENT IN BOTH TRACK AND INTENSITY, LENDING HIGH CONFIDENCE TO THE JTWC FORECAST. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL PRESSURE AT 291800Z IS 997 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 291800Z IS 18 FEET.// NNNN