WTKO20 RKSL 131800 KMA TROPICAL CYCLONE ADVISORY NO. 21 NAME 1606 CONSON ANALYSIS POSITION 131800UTC 34.0N 152.1E MOVEMENT NNW 16KT PRES/VMAX 996HPA 39KT FORECAST 12HR POSITION 140600UTC 37.4N 148.7E WITHIN 30NM PRES/VMAX 996HPA 39KT 24HR POSITION 141800UTC 42.7N 146.4E WITHIN 0NM PRES 998HPA KOREA METEOROLOGICAL ADMINISTRATION.