WTPN32 PGTW 062100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 13W (LEEPI) WARNING NR 012// RMKS/ 1. TROPICAL STORM 13W (LEEPI) WARNING NR 012 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 061800Z --- NEAR 39.2N 153.4E MOVEMENT PAST SIX HOURS - 055 DEGREES AT 22 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 BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 000 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT REPEAT POSIT: 39.2N 153.4E --- FORECASTS: 12 HRS, VALID AT: 070600Z --- 42.0N 158.1E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 060 NM SOUTHEAST QUADRANT 020 NM SOUTHWEST QUADRANT 000 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 050 DEG/ 30 KTS --- 24 HRS, VALID AT: 071800Z --- 45.7N 164.5E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 062100Z POSITION NEAR 39.9N 154.6E. 06SEP24. TROPICAL STORM 13W (LEEPI), LOCATED APPROXIMATELY 567 NM EAST OF MISAWA, JAPAN, HAS TRACKED NORTHEASTWARD AT 22 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS A SMALL AND SHALLOW LOW LEVEL CIRCULATION CENTER (LLCC), MOVING RAPIDLY NORTHEASTWARD UNDER STRONG UPPER-LEVEL SOUTHWESTERLY FLOW INDICATED BY A BROAD REGION OF CIRRUS STREAMERS. MANUAL AND AUTOMATED PHASE CLASSIFICATION WORKSHEETS AS WELL AS A FSU PHASE SPACE DIAGRAM SHOW THE SYSTEM AS A SUBTROPICAL OR HYBRID, SYSTEM, WITH CHARACTERISTICS OF BOTH A TROPICAL AND EXTRATROPICAL LOW. THE JTWC ASSESSMENT IS THAT THE SYSTEM IS UNDERGOING EXTRATROPICAL TRANSITION (ETT), HAVING CROSSED NORTH OF THE 26C ISOTHERM, MOVING INTO A BAROCLINIC ZONE AND THERMAL RIBBON, AND EMBEDDING IN PHASE WITH A 500MB SHORTWAVE TROUGH. THE SYSTEM WILL CONTINUE TO ACCELERATE NORTHEASTWARD WHILE UNDERGOING ETT, WHILE MAINTAINING ITS CURRENT INTENSITY OF 35 KNOTS. FULL TRANSITION TO A WEAK GALE-FORCE LOW PRESSURE AREA IS EXPECTED WITHIN THE NEXT 12 HOURS. 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 061800Z IS 1003 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 061800Z IS 16 FEET. REFER TO TYPHOON 12W (YAGI) WARNINGS (WTPN31 PGTW) FOR SIX-HOURLY UPDATES. // NNNN