WTKO20 RKSL 030000 KMA TROPICAL CYCLONE ADVISORY NO. 1 NAME 1801 BOLAVEN ANALYSIS POSITION 030000UTC 10.5N 115.9E MOVEMENT WNW 14KT PRES/VMAX 1002HPA 35KT FORECAST 24HR POSITION 040000UTC 10.8N 110.8E WITHIN 75NM PRES/VMAX 1000HPA 35KT 48HR POSITION 050000UTC 11.5N 106.7E WITHIN 0NM PRES 1006HPA KOREA METEOROLOGICAL ADMINISTRATION.