WTPN31 PGTW 100900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL STORM 21W (BARIJAT) WARNING NR 015// RMKS/ 1. TROPICAL STORM 21W (BARIJAT) WARNING NR 015 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 100600Z --- NEAR 34.8N 150.9E MOVEMENT PAST SIX HOURS - 015 DEGREES AT 23 KTS POSITION ACCURATE TO WITHIN 020 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 - 210 NM NORTHEAST QUADRANT 175 NM SOUTHEAST QUADRANT 015 NM SOUTHWEST QUADRANT 100 NM NORTHWEST QUADRANT REPEAT POSIT: 34.8N 150.9E --- FORECASTS: 12 HRS, VALID AT: 101800Z --- 38.7N 152.9E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 230 NM NORTHEAST QUADRANT 160 NM SOUTHEAST QUADRANT 040 NM SOUTHWEST QUADRANT 220 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 015 DEG/ 23 KTS --- 24 HRS, VALID AT: 110600Z --- 43.1N 154.3E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 250 NM NORTHEAST QUADRANT 180 NM SOUTHEAST QUADRANT 100 NM SOUTHWEST QUADRANT 240 NM NORTHWEST QUADRANT --- REMARKS: 100900Z POSITION NEAR 35.8N 151.4E. 10OCT24. TROPICAL STORM (TS) 21W (BARIJAT), LOCATED APPROXIMATELY 551 NM EAST OF YOKOSUKA, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD AT 23 KNOTS OVER THE PAST SIX HOURS. THE SYSTEM IS ASSESSED TO BE UNDERGOING EXTRATROPICAL TRANSITION (ETT) AND WILL COMPLETE TRANSITION WITHIN THE NEXT 12 HOURS. THE CURRENT POSITION WAS ASSESSED WITH HIGH CONFIDENCE BASED ON ANIMATED MULTISPECTRAL IMAGERY DEPICTING DEEP CONVECTION EASTWARD AND POLEWARD OF A PARTIALLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) WITH FRONTOGENESIS TO THE SOUTH AND EAST. SUBSIDENT DRY AIR ENTRAINS INTO THE SYSTEM FROM THE SOUTHWEST. THE CURRENT INTENSITY IS ASSESSED WITH HIGH CONFIDENCE BASED ON EARLIER 100236Z OCEANSAT-3 OSCAT DATA REVEALING A HIGHLY ASYMMETRIC WIND FIELD WITH A BAND OF 30-35KT WINDS LOCATED TO THE NORTHEAST OF THE LLCC. HIGH SHEAR OF 35-40KTS AND STRONG POLEWARD OUTFLOW IS INDUCED BY AN UPPER-LEVEL SHORTWAVE TROUGH LOCATED NORTHWEST OF THE SYSTEM. BAROCLINIC FORCING OVER THE NEXT 24 HOURS WILL CAUSE THE SYSTEM TO INTENSIFY TO 45KTS WHILE TRACKING NORTH-NORTHEASTWARD AND BECOMING FURTHER EMBEDDED WITHIN THE UPPER-LEVEL JET. 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 100600Z IS 993 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 100600Z IS 18 FEET.// NNNN