WTPN31 PGTW 040300 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 27W (NYATOH) WARNING NR 019// RMKS/ 1. TROPICAL STORM 27W (NYATOH) WARNING NR 019 DOWNGRADED FROM TYPHOON 27W 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 040000Z --- NEAR 28.2N 146.6E MOVEMENT PAST SIX HOURS - 030 DEGREES AT 25 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT 055 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT REPEAT POSIT: 28.2N 146.6E --- FORECASTS: 12 HRS, VALID AT: 041200Z --- 29.9N 148.6E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 010 NM NORTHEAST QUADRANT 030 NM SOUTHEAST QUADRANT 060 NM SOUTHWEST QUADRANT 040 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 055 DEG/ 08 KTS --- 24 HRS, VALID AT: 050000Z --- 30.8N 150.0E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL VECTOR TO 36 HR POSIT: 070 DEG/ 07 KTS --- 36 HRS, VALID AT: 051200Z --- 31.2N 151.5E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 040300Z POSITION NEAR 28.6N 147.1E. 04DEC21. TROPICAL STORM 27W (NYATOH), LOCATED APPROXIMATELY 350 NM NORTHEAST OF IWO TO, HAS TRACKED NORTH-NORTHEASTWARD AT 25 KNOTS OVER THE PAST SIX HOURS. UPON EXTENSIVE SATELLITE ANALYSIS THERE IS A CHANGE TO THE FORECAST PHILOSOPHY FOR TS 27W. THE SYSTEM HAS BECOME EXTRA-TROPICAL VICE DISSIPATING OVER WATER AS PREVIOUSLY FORECASTED. TS 27W IS MERGING WITH A FRONTAL BOUNDARY THAT IS ASSOCIATED WITH A BAROCLINIC LOW THAT IS PASSING SOUTH OF KAMCHATKA. THE SYSTEM IS ALSO LOCATED DIRECTLY UNDER THE JET AND THE VORTEX HAS BECOME CORRODED. ANIMATED ENHANCED MULTISPECTRAL SATELLITE IMAGERY AND A 032117Z SSMIS 91GHZ REVEAL THE SYSTEM IS BARELY APPARENT AND SHOWING SIGNS OF ITS OWN FRONTAL DEVELOPMENT. NUMERICAL MODEL GUIDANCE HAVE A HARD TIME AGREEING WITH A VORTEX CENTER, LIKELY DUE TO THE SYSTEM UNDERGOING A RAPID TRANSITION TO EXTRA-TROPICAL. 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. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 040000Z IS 28 FEET. // NNNN