WTPN33 PGTW 180900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 08W (AMPIL) WARNING NR 024// RMKS/ 1. TROPICAL STORM 08W (AMPIL) WARNING NR 024 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 180600Z --- NEAR 40.5N 155.3E MOVEMENT PAST SIX HOURS - 070 DEGREES AT 22 KTS POSITION ACCURATE TO WITHIN 040 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 EXTRATROPICAL RADIUS OF 050 KT WINDS - 065 NM NORTHEAST QUADRANT 105 NM SOUTHEAST QUADRANT 095 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 145 NM NORTHEAST QUADRANT 190 NM SOUTHEAST QUADRANT 170 NM SOUTHWEST QUADRANT 115 NM NORTHWEST QUADRANT REPEAT POSIT: 40.5N 155.3E --- FORECASTS: 12 HRS, VALID AT: 181800Z --- 42.7N 160.4E MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 050 KT WINDS - 075 NM NORTHEAST QUADRANT 095 NM SOUTHEAST QUADRANT 065 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 200 NM NORTHEAST QUADRANT 220 NM SOUTHEAST QUADRANT 190 NM SOUTHWEST QUADRANT 130 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 055 DEG/ 24 KTS --- 24 HRS, VALID AT: 190600Z --- 45.4N 165.8E MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 050 KT WINDS - 080 NM NORTHEAST QUADRANT 100 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 020 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 210 NM NORTHEAST QUADRANT 230 NM SOUTHEAST QUADRANT 200 NM SOUTHWEST QUADRANT 140 NM NORTHWEST QUADRANT --- REMARKS: 180900Z POSITION NEAR 41.1N 156.6E. 18AUG24. TROPICAL STORM 08W (AMPIL), LOCATED APPROXIMATELY 643 NM EAST OF MISAWA, JAPAN, HAS TRACKED EAST-NORTHEASTWARD AT 22 KNOTS OVER THE PAST SIX HOURS. THE CURRENT POSITION IS SITUATED WITHIN A PARTIALLY EXPOSED LOW-LEVEL CIRCULATION CENTER EVIDENT IN MULTISPECTRAL SATELLITE IMAGERY. THE INITIAL INTENSITY OF 55 KNOTS IS CONSISTENT WITH A CONSENSUS OF RECENT SUBJECTIVE DVORAK AND AUTOMATED INTENSITY ESTIMATES AND SUPPORTED BY PEAK WIND SPEEDS EVIDENT IN A 180140Z OCEANSAT-3 PASS AS WELL AS EARLIER ASCAT DATA. OVER THE PAST SIX HOURS, 08W HAS MERGED WITH THE MID-LATITUDE WESTERLY FLOW PATTERN AND IS RAPIDLY UNDERGOING EXTRATROPICAL TRANSITION. THIS TRANSITION IS EXPECTED TO COMPLETE WITHIN THE NEXT 12 HOURS. ASSOCIATED MAXIMUM SUSTAINED SURFACE WIND SPEEDS WILL LIKELY REMAIN AT OR ABOVE 50 KNOTS FOR THE NEXT 24 HOURS DUE TO FAVORABLE BAROCLINIC SUPPORT. 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 180600Z IS 983 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 180600Z IS 28 FEET.// NNNN