WTPS31 PGTW 010900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 23P (URMIL) WARNING NR 011// RMKS/ 1. TROPICAL CYCLONE 23P (URMIL) WARNING NR 011 01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 010600Z --- NEAR 25.7S 179.2E MOVEMENT PAST SIX HOURS - 135 DEGREES AT 24 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING SUBTROPICAL RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT 050 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 155 NM NORTHEAST QUADRANT 155 NM SOUTHEAST QUADRANT 100 NM SOUTHWEST QUADRANT 085 NM NORTHWEST QUADRANT REPEAT POSIT: 25.7S 179.2E --- FORECASTS: 12 HRS, VALID AT: 011800Z --- 29.7S 175.5W MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY SUBTROPICAL RADIUS OF 050 KT WINDS - 090 NM NORTHEAST QUADRANT 030 NM SOUTHEAST QUADRANT 030 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 230 NM NORTHEAST QUADRANT 220 NM SOUTHEAST QUADRANT 120 NM SOUTHWEST QUADRANT 150 NM NORTHWEST QUADRANT --- REMARKS: 010900Z POSITION NEAR 26.7S 179.5W. 01MAR26. TROPICAL CYCLONE 23P (URMIL), LOCATED APPROXIMATELY 458 NM SOUTH OF SUVA, FIJI, HAS TRACKED SOUTHEASTWARD AT 24 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) DEPICTS ELONGATED AND HEAVILY SHEARED SYSTEM, WITH MAJORITY OF THE REMAINING CONVECTION LOCATED POLEWARD AND EASTWARD OF THE ASSESSED LOW-LEVEL CIRCULATION CENTER (LLCC). THE SYSTEM IS CURRENTLY ANALYZED AS UNDERGOING ITS SUBTROPICAL TRANSITION (STT), WITH WARM CORE TEMPERATURE ANOMALY CONTAINED ONLY NEAR SURFACE, INDICATING FRONTOGENESIS. COLD ANOMALY IS PRESENT IN WITHIN THE UPPER-LEVELS. THE LOCATION OF TC 23P IS POLEWARD OF THE SUBTROPICAL RIDGE AXIS AND THE SYSTEM IS APPROACHING EVEN MORE HOSTILE ENVIRONMENT, WITH DECREASING OCEAN HEAT CONTENT AND RAPIDLY AND DRASTICALLY INCREASING VERTICAL WIND SHEAR. AS THE SYSTEM COMPLETES THE TRANSITION WITHIN THE NEXT 12 HOURS, IT IS EXPECTED TO MAINTAIN WIND SPEEDS WELL ABOVE GALE FORCE (50 KTS). 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 010600Z IS 983 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 010600Z IS 18 FEET.// NNNN