WTPN31 PGTW 030900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 06W (JANGMI) WARNING NR 029// RMKS/ 1. TROPICAL STORM 06W (JANGMI) WARNING NR 029 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 030600Z --- NEAR 34.9N 141.4E MOVEMENT PAST SIX HOURS - 075 DEGREES AT 30 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE AND RADAR PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT 065 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 180 NM NORTHEAST QUADRANT 210 NM SOUTHEAST QUADRANT 165 NM SOUTHWEST QUADRANT 125 NM NORTHWEST QUADRANT REPEAT POSIT: 34.9N 141.4E --- FORECASTS: 12 HRS, VALID AT: 031800Z --- 36.3N 145.6E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 015 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 220 NM NORTHEAST QUADRANT 210 NM SOUTHEAST QUADRANT 160 NM SOUTHWEST QUADRANT 150 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 085 DEG/ 10 KTS --- 24 HRS, VALID AT: 040600Z --- 36.5N 148.0E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 240 NM NORTHEAST QUADRANT 110 NM SOUTHEAST QUADRANT 160 NM SOUTHWEST QUADRANT 190 NM NORTHWEST QUADRANT --- REMARKS: 030900Z POSITION NEAR 35.2N 142.5E. 03JUN26. TROPICAL STORM 06W (JANGMI), LOCATED APPROXIMATELY 69 NM SOUTHEAST OF NARITA AIRPORT, HAS TRACKED EAST-NORTHEASTWARD AT 30 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) DEPICTS AN ELONGATED AND HEAVILY SHEARED SYSTEM, WITH A NEARLY FULLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) AND REMAINING ASSOCIATED CONVECTION LOCATED POLEWARD AND EASTWARD. THE SYSTEM IS CURRENTLY BECOMING EXTRATROPICAL, DUE TO CROSSING INTO THE BAROCLINIC ZONE TO THE NORTH. MODEL DATA INDICATES EXTRATROPICAL TRANSITION (ETT) COMPLETION WITHIN THE NEXT 12 HOURS, WITH SIGNIFICANTLY INCREASED TEMPERATURE ADVECTION AND TS 06W EXHIBITING FRONTAL CHARACTERISTICS. ASSESSMENT IS SUPPORTED BY GFS AND ECMWF EXPECTED LLCC POSITION AHEAD AND POLEWARD OF THE SUBTROPICAL JET MAXIMUM. ADDITIONAL ANALYSIS REVEALS INCREASINGLY HOSTILE ENVIRONMENT WITH COLD (21-22 C) SEA SURFACE TEMPERATURES, NO RESIDUAL OCEAN HEAT CONTENT AND INCREASING VERTICAL WIND SHEAR (VWS) CURRENTLY ESTIMATED AT 40-45 KTS. DRY AIR ENTRAINMENT FROM THE WEST IS ONGOING AND EXPECTED TO BE MORE PRONOUNCED WITHIN THE NEXT 12 HOURS, WHILE THE VWS IS EXPECTED TO INCREASE TO 50-55 KTS. NUMERICAL MODEL GUIDANCE IS IN STRONG AGREEMENT REGARDING THE TRACK AND INTENSITY, RESULTING IN HIGH CONFIDENCE OF THE OFFICIAL 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 030600Z IS 983 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 030600Z IS 30 FEET. // NNNN