WTKO20 RKSL 160600 KMA TROPICAL CYCLONE ADVISORY NO. 11 NAME 1607 CHANTHU ANALYSIS POSITION 160600UTC 33.1N 141.5E MOVEMENT NNW 19KT PRES/VMAX 990HPA 47KT FORECAST 12HR POSITION 161800UTC 35.7N 141.1E WITHIN 30NM PRES/VMAX 990HPA 47KT 24HR POSITION 170600UTC 40.4N 142.1E WITHIN 75NM PRES/VMAX 994HPA 41KT 36HR POSITION 171800UTC 47.1N 143.9E WITHIN 0NM PRES 998HPA KOREA METEOROLOGICAL ADMINISTRATION.