WTKO20 RKSL 031200 KMA TROPICAL CYCLONE ADVISORY NO. 3 NAME 1801 BOLAVEN ANALYSIS POSITION 031200UTC 11.5N 113.2E MOVEMENT WNW 17KT PRES/VMAX 1000HPA 35KT FORECAST 24HR POSITION 041200UTC 11.6N 108.2E WITHIN 0NM PRES 1002HPA KOREA METEOROLOGICAL ADMINISTRATION.