WTKO20 RKSL 261800 KMA TROPICAL CYCLONE ADVISORY NO. 4 NAME 1701 MUIFA ANALYSIS POSITION 261800UTC 14.4N 134.2E MOVEMENT NW 5KT PRES/VMAX 1000HPA 35KT FORECAST 24HR POSITION 271800UTC 17.4N 135.3E WITHIN 75NM PRES/VMAX 1000HPA 35KT 48HR POSITION 281800UTC 20.1N 139.5E WITHIN 0NM PRES 1004HPA KOREA METEOROLOGICAL ADMINISTRATION.