WTKO20 RKSL 221200 KMA TROPICAL CYCLONE ADVISORY NO. 4 NAME 1626 NOCK-TEN ANALYSIS POSITION 221200UTC 10.2N 136.5E MOVEMENT NW 16KT PRES/VMAX 990HPA 47KT FORECAST 24HR POSITION 231200UTC 11.8N 131.4E WITHIN 75NM PRES/VMAX 980HPA 56KT 48HR POSITION 241200UTC 13.4N 126.9E WITHIN 125NM PRES/VMAX 970HPA 68KT 72HR POSITION 251200UTC 14.5N 121.9E WITHIN 175NM PRES/VMAX 960HPA 76KT 96HR POSITION 261200UTC 15.2N 117.4E WITHIN 250NM PRES/VMAX 975HPA 62KT 120HR POSITION 271200UTC 15.3N 112.9E WITHIN 295NM PRES/VMAX 985HPA 52KT KOREA METEOROLOGICAL ADMINISTRATION.