WTPN53 PGTW 132100 WARNING ATCG MIL 27W NWP 261013194852 2026101318 27W KOGUMA 036 02 045 20 SATL 030 T000 383N 1572E 050 R050 070 NE QD 070 SE QD 070 SW QD 050 NW QD R034 140 NE QD 160 SE QD 100 SW QD 095 NW QD T012 406N 1609E 040 R034 190 NE QD 190 SE QD 140 SW QD 100 NW QD T024 420N 1653E 035 R034 220 NE QD 195 SE QD 180 SW QD 060 NW QD AMP 000HR BECOMING EXTRATROPICAL 012HR EXTRATROPICAL 024HR EXTRATROPICAL SUBJ: TROPICAL STORM 27W (KOGUMA) WARNING NR 036 1. TROPICAL STORM 27W (KOGUMA) WARNING NR 036 02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 131800Z --- NEAR 38.3N 157.2E MOVEMENT PAST SIX HOURS - 045 DEGREES AT 20 KTS POSITION ACCURATE TO WITHIN 030 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT WIND RADII VALID OVER OPEN WATER ONLY BECOMING SUBTROPICAL RADIUS OF 050 KT WINDS - 070 NM NORTHEAST QUADRANT 070 NM SOUTHEAST QUADRANT 070 NM SOUTHWEST QUADRANT 050 NM NORTHWEST QUADRANT RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT 160 NM SOUTHEAST QUADRANT 100 NM SOUTHWEST QUADRANT 095 NM NORTHWEST QUADRANT REPEAT POSIT: 38.3N 157.2E --- FORECASTS: 12 HRS, VALID AT: 140600Z --- 40.6N 160.9E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY SUBTROPICAL RADIUS OF 034 KT WINDS - 190 NM NORTHEAST QUADRANT 190 NM SOUTHEAST QUADRANT 140 NM SOUTHWEST QUADRANT 100 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 065 DEG/ 18 KTS --- 24 HRS, VALID AT: 141800Z --- 42.0N 165.3E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY SUBTROPICAL RADIUS OF 034 KT WINDS - 220 NM NORTHEAST QUADRANT 195 NM SOUTHEAST QUADRANT 180 NM SOUTHWEST QUADRANT 060 NM NORTHWEST QUADRANT --- REMARKS: 132100Z POSITION NEAR 38.9N 158.1E. 13OCT26. TROPICAL STORM 27W (KOGUMA), LOCATED APPROXIMATELY 752 NM EAST OF MISAWA, JAPAN, HAS TRACKED NORTHEASTWARD AT 20 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED IMAGERY (EIR) SHOWS 27W WITH AN INCREASINGLY ASYMMETRICAL STRUCTURE AND LOSS OF CENTRAL CONVECTION. FURTHER ANALYSIS REVEALS 27W HAS LOST TROPICAL CHARACTERISTICS WITH AN ASYMMETRICAL WIND FIELD AND CONVECTIVE STRUCTURE AS WELL AS EXPANDING RADIUS OF MAXIMUM WINDS (RMW). ADDITIONALLY, THE SYSTEM IS CURRENTLY WITHIN LESS THAN 24 C SEA SURFACE TEMPERATURES AND 30-40 KTS OF VERTICAL WIND SHEAR WHICH CONTINUES TO ENTRAIN DRY AIR INTO THE CORE. THE SYSTEM IS ASSESSED TO HAVE BEGUN SUBTROPICAL TRANSITION (STT) AND IS EXPECTED TO COMPLETE WITHIN 12 HOURS, WITH LIKELY SUBSEQUENT EXTRATROPICAL TRANSITION (ETT) AS THE SYSTEM NEARS THE UPPER LEVEL JET AND STRONGER BAROCLINIC ZONE. THE SYSTEM IS EXPECTED TO STEADILY WEAKEN AS IT TRANSITIONS DUE TO THE HOSTILE ENVIRONMENTAL CONDITIONS. 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 131800Z IS 988MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 131800Z IS 24 FEET.REFER TO TROPICAL UPDATES. // 2726100306 81N1679E 20 2726100312 83N1674E 20 2726100318 87N1675E 20 2726100400 91N1674E 20 2726100406 93N1673E 20 2726100412 95N1673E 20 2726100418 99N1676E 25 2726100500 105N1680E 30 2726100506 109N1682E 35 2726100512 115N1680E 35 2726100518 122N1676E 40 2726100600 128N1670E 45 2726100606 134N1666E 45 2726100612 141N1657E 45 2726100618 148N1648E 45 2726100700 152N1640E 45 2726100706 155N1632E 45 2726100712 159N1625E 50 2726100712 159N1625E 50 2726100718 165N1618E 55 2726100718 165N1618E 55 2726100800 168N1611E 55 2726100800 168N1611E 55 2726100806 172N1601E 60 2726100806 172N1601E 60 2726100812 177N1589E 70 2726100812 177N1589E 70 2726100812 177N1589E 70 2726100818 181N1575E 75 2726100818 181N1575E 75 2726100818 181N1575E 75 2726100900 185N1565E 85 2726100900 185N1565E 85 2726100900 185N1565E 85 2726100906 193N1555E 95 2726100906 193N1555E 95 2726100906 193N1555E 95 2726100912 201N1541E 100 2726100912 201N1541E 100 2726100912 201N1541E 100 2726100918 208N1527E 105 2726100918 208N1527E 105 2726100918 208N1527E 105 2726101000 214N1515E 115 2726101000 214N1515E 115 2726101000 214N1515E 115 2726101006 222N1504E 115 2726101006 222N1504E 115 2726101006 222N1504E 115 2726101012 229N1496E 120 2726101012 229N1496E 120 2726101012 229N1496E 120 2726101018 238N1488E 120 2726101018 238N1488E 120 2726101018 238N1488E 120 2726101100 245N1482E 120 2726101100 245N1482E 120 2726101100 245N1482E 120 2726101106 253N1478E 115 2726101106 253N1478E 115 2726101106 253N1478E 115 2726101112 261N1475E 110 2726101112 261N1475E 110 2726101112 261N1475E 110 2726101118 272N1473E 105 2726101118 272N1473E 105 2726101118 272N1473E 105 2726101200 284N1473E 100 2726101200 284N1473E 100 2726101200 284N1473E 100 2726101206 298N1476E 90 2726101206 298N1476E 90 2726101206 298N1476E 90 2726101212 314N1485E 85 2726101212 314N1485E 85 2726101212 314N1485E 85 2726101218 324N1499E 85 2726101218 324N1499E 85 2726101218 324N1499E 85 2726101300 339N1517E 80 2726101300 339N1517E 80 2726101300 339N1517E 80 2726101306 353N1536E 70 2726101306 353N1536E 70 2726101306 353N1536E 70 2726101312 369N1554E 60 2726101312 369N1554E 60 2726101318 383N1572E 50 2726101318 383N1572E 50 NNNN 0000339400 00001