WTPN31 PGTW 240900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL STORM 23W (CIMARON) WARNING NR 027 03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 240600Z --- NEAR 40.8N 137.7E MOVEMENT PAST SIX HOURS - 030 DEGREES AT 21 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 BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT 170 NM SOUTHEAST QUADRANT 155 NM SOUTHWEST QUADRANT 165 NM NORTHWEST QUADRANT REPEAT POSIT: 40.8N 137.7E --- FORECASTS: 12 HRS, VALID AT: 241800Z --- 42.6N 143.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT 150 NM SOUTHEAST QUADRANT 150 NM SOUTHWEST QUADRANT 190 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 090 DEG/ 27 KTS --- 24 HRS, VALID AT: 250600Z --- 42.4N 150.7E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 240900Z POSITION NEAR 41.2N 139.1E. TROPICAL STORM 23W (CIMARON), LOCATED APPROXIMATELY 161 NM WEST OF MISAWA, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 21 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTI-SPECTRAL SATELLITE IMAGERY (MSI) DEPICTS A WEAKENING SYSTEM, WITH A DECOUPLED AND FULLY EXPOSED LLCC AND EXPANDING ASYMMETRIC CLOUD SHIELD. THE INITIAL POSITION IS PLACED WITH HIGH CONFIDENCE BASED ON THE EXPOSED LLCC. THE INITIAL INTENSITY OF 45 KNOTS IS BASED ON A 240111Z ASCAT PASS SHOWING 40-44 KT WIND BARBS TO THE SOUTHEAST OF THE CENTER, AND ABOVE A PGTW SUBTROPICAL FIX OF 35 KTS. ENVIRONMENTAL ANALYSIS SHOWS THAT THE SYSTEM LIES IN AN AREA OF HIGH (30+ KNOTS) VWS UNDER THE MIDLATITUDE JET AND COOL (24-25 DEG CELSIUS) SSTS. THE CYCLONE CONTINUES TO TRACK RAPIDLY TOWARDS THE NORTHEAST CARRIED ALONG BY THE WESTERLY JET. DUE TO THE POSITION UNDER THE WESTERLY JET AND COOL SSTS, 23W HAS BEGUN EXTRATROPICAL TRANSITION, WITH A 232200Z AMSU CORE TEMPERATURE CROSS-SECTION SHOWING A BUILDING COLD-CORE ANOMALY AT MID-LEVELS. 23W WILL CONTINUE TO ACCELERATE TOWARDS THE EAST- NORTHEAST UNDER THE WESTERLY JET, AND TRANSITION INTO A COLD-CORE SYSTEM WITH EXPANSIVE WIND FIELDS AND ASYMMETRIC CONVECTION. MODELS SHOW THAT 23W AND 22W WILL REMAIN DISTINCT SYSTEMS. 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 240600Z IS 18 FEET. REFER TO TROPICAL STORM 22W (SOULIK) WARNINGS (WTPN35 PGTW) FOR SIX-HOURLY UPDATES. REFER TO TROPICAL DEPRESSION 24W (TWENTYFOUR) WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES.// NNNN