WTPN51 PGTW 221500 WARNING ATCP MIL 04W NWP 100722134156 2010072212 04W CHANTHU 018 01 305 09 SATL 060 T000 219N 1097E 055 T012 227N 1082E 040 T024 234N 1069E 020 AMP 000HR DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND 012HR DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND 024HR DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND SUBJ: TROPICAL STORM 04W (CHANTHU) WARNING NR 018 1. TROPICAL STORM 04W (CHANTHU) WARNING NR 018 DOWNGRADED FROM TYPHOON 04W 01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 221200Z --- NEAR 21.9N 109.7E MOVEMENT PAST SIX HOURS - 305 DEGREES AT 09 KTS POSITION ACCURATE TO WITHIN 060 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 DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND REPEAT POSIT: 21.9N 109.7E --- FORECASTS: 12 HRS, VALID AT: 230000Z --- 22.7N 108.2E MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 24 HR POSIT: 300 DEG/ 07 KTS --- 24 HRS, VALID AT: 231200Z --- 23.4N 106.9E MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 221500Z POSITION NEAR 22.1N 109.3E. TROPICAL STORM (TS) 04W (CHANTHU). LOCATED APPROXIMATELY 45 NM NORTHWEST OF ZHANJIANG, CHINA, HAS TRACKED NORTHWESTWARD AT 09 KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED SATELLITE IMAGERY INDICATES THAT THE SYSTEM HAS BEGUN TO WEAKEN DUE TO LAND INTERACTION OVER THE PAST 06 HOURS. THE LOW-LEVEL CIRCULATION CENTER (LLCC) HAS BECOME PARTIALLY- EXPOSED WITH DEEP CONVECTION CONFINED TO THE SOUTHERN SEMI-CIRCLE. A 221139Z SSMIS 91H GHZ IMAGE INDICATED CURVED BANDING WRAPPING FROM THE SOUTHWEST QUADRANT INTO THE NORTHEAST QUADRANT. THE CURRENT POSITION IS BASED ON THIS IMAGE AS WELL AS THE PARTIALLY- EXPOSED LLCC WITH GOOD CONFIDENCE. THERE IS LOW CONFIDENCE IN THE CURRENT INTENSITY, WHICH IS BASED PRIMARILY ON THE SATELLITE SIGNATURE DUE TO THE LACK OF OBSERVATIONAL DATA. TS 04W IS TRACKING NORTHWESTWARD ALONG THE SOUTHWESTERN PERIPHERY OF A DEEP SUBTROPICAL RIDGE EXTENDING WEST INTO EASTERN CHINA. THE SYSTEM IS FORECAST TO TRACK WEST-NORTHWESTWARD THROUGH THE FORECAST PERIOD. THE NUMERICAL MODEL GUIDANCE IS TIGHTLY CLUSTERED AND SUPPORTS THIS FORECAST WITH THE EXCEPTION OF TC-LAPS WHICH DEPICTS AN UNLIKELY RE-CURVE TRACK AND ECMWF. THIS FORECAST IS POSITIONED SLIGHTLY LEFT OF THE JTWC MODEL CONSENSUS. TY 04W IS EXPECTED TO DISSIPATE BETWEEN TAU 12 AND 24 JUST NORTH OF VIETNAM. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVMARFCSTCEN). THE SYSTEM WILL BE CLOSELY MONI- TORED FOR SIGNS OF REGENERATION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 221200Z IS 12 FEET. // 0410071618 154N1234E 15 0410071700 153N1232E 15 0410071706 152N1230E 15 0410071712 152N1228E 15 0410071718 152N1225E 20 0410071800 153N1219E 25 0410071806 154N1212E 30 0410071812 154N1204E 30 0410071818 153N1193E 25 0410071900 152N1182E 30 0410071906 153N1172E 30 0410071912 159N1166E 30 0410071918 166N1164E 35 0410072000 174N1159E 35 0410072006 179N1152E 35 0410072012 182N1145E 40 0410072018 182N1136E 45 0410072100 184N1131E 55 0410072100 184N1131E 55 0410072106 189N1128E 45 0410072112 193N1124E 55 0410072112 193N1124E 55 0410072118 199N1119E 60 0410072118 199N1119E 60 0410072200 207N1114E 75 0410072200 207N1114E 75 0410072200 207N1114E 75 0410072206 214N1105E 70 0410072206 214N1105E 70 0410072206 214N1105E 70 0410072212 219N1097E 55 NNNN