WTKO20 RKSL 160000 KMA TROPICAL CYCLONE ADVISORY NO. 4 NAME 1704 TALAS ANALYSIS POSITION 160000UTC 17.6N 109.6E MOVEMENT W 8KT PRES/VMAX 990HPA 45KT FORECAST 24HR POSITION 170000UTC 18.7N 105.1E WITHIN 75NM PRES/VMAX 985HPA 52KT 48HR POSITION 180000UTC 20.2N 99.8E WITHIN 0NM PRES 1004HPA KOREA METEOROLOGICAL ADMINISTRATION.