WTPN51 PGTW 032100 WARNING ATCG MIL 12W NWP 250803193939 2025080318 12W KROSA 045 03 070 22 SATL 060 T000 420N 1603E 045 R034 000 NE QD 120 SE QD 120 SW QD 045 NW QD T012 432N 1660E 035 R034 030 NE QD 120 SE QD 120 SW QD 070 NW QD T024 438N 1724E 030 AMP 000HR BECOMING EXTRATROPICAL 012HR EXTRATROPICAL 024HR EXTRATROPICAL SUBJ: TROPICAL STORM 12W (KROSA) WARNING NR 045 1. TROPICAL STORM 12W (KROSA) WARNING NR 045 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 031800Z --- NEAR 42.0N 160.3E MOVEMENT PAST SIX HOURS - 070 DEGREES AT 22 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING EXTRATROPICAL RADIUS OF 034 KT WINDS - 000 NM NORTHEAST QUADRANT 120 NM SOUTHEAST QUADRANT 120 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT REPEAT POSIT: 42.0N 160.3E --- FORECASTS: 12 HRS, VALID AT: 040600Z --- 43.2N 166.0E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT 120 NM SOUTHEAST QUADRANT 120 NM SOUTHWEST QUADRANT 070 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 080 DEG/ 23 KTS --- 24 HRS, VALID AT: 041800Z --- 43.8N 172.4E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY EXTRATROPICAL --- REMARKS: 032100Z POSITION NEAR 42.3N 161.7E. 03AUG25. TROPICAL STORM 12W (KROSA), LOCATED APPROXIMATELY 866 NM EAST-NORTHEAST OF MISAWA, JAPAN, HAS TRACKED EAST-NORTHEASTWARD AT 22 KTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR) SATELLITE IMAGERY DEPICTS AN ELONGATED AND HEAVILY SHEARED SYSTEM, WITH NEARLY FULLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) AND REMAINING ASSOCIATED CONVECTION TO THE EAST. ADDITIONALLY, AN OLDER 021048Z METOP-B ASCAT IMAGE SHOWED HIGHLY ASYMMETRIC WIND FIELD, WITH HIGHER INTENSITIES ALONG THE SOUTHERN PORTION OF THE CIRCULATION. THE SYSTEM IS CURRENTLY BECOMING EXTRATROPICAL, DUE TO CROSSING INTO THE BAROCLINIC ZONE TO THE NORTH. TS 12W IS POSITIONED POLEWARD OF A WESTERN EXTENSION OF A SUBTROPICAL JET. ASSESSMENT IS SUPPORTED BY GFS AND ECMWS PHASE CYCLONE DIAGRAMS. ADDITIONALLY, VERY COLD (17-18 C) SEA SURFACE TEMPERATURES AND INCREASING VERTICAL WIND SHEAR ARE CREATING AN INCREASINGLY HOSTILE ENVIRONMENT FOR TROPICAL DEVELOPMENT. NUMERICAL MODEL GUIDANCE IS IN STRONG AGREEMENT IN REGARD TO 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 031800Z IS 983 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 031800Z IS 22 FEET. REFER TO TROPICAL CYCLONE 01C UPDATES. // 1225072218 126N1460E 20 1225072300 129N1453E 20 1225072306 130N1448E 20 1225072312 131N1443E 20 1225072318 132N1440E 25 1225072400 139N1437E 30 1225072406 151N1434E 30 1225072412 157N1433E 35 1225072418 163N1433E 35 1225072500 169N1434E 40 1225072506 172N1435E 40 1225072512 175N1436E 45 1225072518 177N1434E 45 1225072600 178N1437E 50 1225072600 178N1437E 50 1225072606 179N1441E 50 1225072606 179N1441E 50 1225072612 185N1446E 50 1225072612 185N1446E 50 1225072618 193N1447E 55 1225072618 193N1447E 55 1225072700 205N1450E 60 1225072700 205N1450E 60 1225072706 217N1451E 65 1225072706 217N1451E 65 1225072712 229N1453E 75 1225072712 229N1453E 75 1225072712 229N1453E 75 1225072718 244N1453E 80 1225072718 244N1453E 80 1225072718 244N1453E 80 1225072800 260N1449E 80 1225072800 260N1449E 80 1225072800 260N1449E 80 1225072806 269N1441E 70 1225072806 269N1441E 70 1225072806 269N1441E 70 1225072812 274N1436E 60 1225072812 274N1436E 60 1225072818 279N1432E 50 1225072818 279N1432E 50 1225072900 283N1429E 50 1225072900 283N1429E 50 1225072906 285N1429E 45 1225072912 286N1428E 40 1225072918 287N1428E 40 1225073000 287N1430E 40 1225073006 289N1433E 40 1225073012 290N1432E 40 1225073018 293N1432E 45 1225073100 300N1429E 50 1225073100 300N1429E 50 1225073106 302N1426E 45 1225073112 308N1423E 45 1225073118 316N1420E 45 1225080100 329N1416E 55 1225080100 329N1416E 55 1225080106 337N1415E 55 1225080106 337N1415E 55 1225080112 344N1413E 60 1225080112 344N1413E 60 1225080118 353N1416E 60 1225080118 353N1416E 60 1225080200 364N1425E 60 1225080200 364N1425E 60 1225080206 375N1440E 55 1225080206 375N1440E 55 1225080212 384N1458E 55 1225080212 384N1458E 55 1225080218 391N1484E 55 1225080218 391N1484E 55 1225080300 399N1513E 55 1225080300 399N1513E 55 1225080306 405N1542E 50 1225080306 405N1542E 50 1225080312 413N1575E 50 1225080312 413N1575E 50 1225080318 420N1603E 45 NNNN