WTKO20 RKSL 041200 KMA TROPICAL CYCLONE ADVISORY NO. 11 NAME 1703 NANMADOL ANALYSIS POSITION 041200UTC 34.4N 138.3E MOVEMENT ENE 33KT PRES/VMAX 996HPA 39KT FORECAST 12HR POSITION 050000UTC 36.6N 146.8E WITHIN 0NM PRES 1000HPA KOREA METEOROLOGICAL ADMINISTRATION.