WTPN33 PGTW 110300 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE WARNING// RMKS/ 1. TROPICAL STORM 31W (HAIYAN) WARNING NR 032 DOWNGRADED FROM TYPHOON 31W 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 110000Z --- NEAR 21.8N 107.2E MOVEMENT PAST SIX HOURS - 355 DEGREES AT 13 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND REPEAT POSIT: 21.8N 107.2E --- FORECASTS: 12 HRS, VALID AT: 111200Z --- 23.3N 107.9E MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 24 HR POSIT: 055 DEG/ 07 KTS --- 24 HRS, VALID AT: 120000Z --- 24.1N 109.2E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 36 HR POSIT: 075 DEG/ 08 KTS --- 36 HRS, VALID AT: 121200Z --- 24.5N 110.8E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 110300Z POSITION NEAR 22.2N 107.4E. TROPICAL STORM (TS) 31W (HAIYAN), LOCATED APPROXIMATELY 87 NM NORTHEAST OF HANOI, VIETNAM, HAS TRACKED NORTHWARD AT 13 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY INDICATES THAT TS 31W IS RAPIDLY WEAKENING AS IT TRACKS FURTHER INLAND WITH THE BULK OF THE CONVECTION DISPLACED OVER THE NORTHERN SEMI-CIRCLE DUE TO INCREASING SOUTHWESTERLY VERTICAL WIND SHEAR (20 TO 25 KNOTS). THERE IS FAIR CONFIDENCE IN THE INITIAL POSITION. THE INITIAL INTENSITY IS ASSESSED AT 60 KNOTS BASED ON THE RJTD DVORAK FINAL-T AND CURRENT INTENSITY ESTIMATES (55/65 KNOTS). TS 31W IS TRACKING ALONG THE WESTERN PERIPHERY OF THE SUBTROPICAL RIDGE, WHICH IS QUICKLY ERODING DUE TO STRENGTHENING MIDLATITUDE WESTERLY FLOW ACROSS SOUTHERN CHINA. TS 31W IS FORECAST TO TURN EASTWARD AS IT BECOMES EMBEDDED WITHIN THE WESTERLY FLOW AND IS FORECAST TO DISSIPATE OVER LAND BY TAU 36. BASED ON THE TIGHT AGREEMENT OF DYNAMIC MODELS, THERE IS HIGH CONFIDENCE IN THE JTWC FORECAST TRACK. 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.// NNNN