WTKO20 RKSL 020000 KMA TROPICAL CYCLONE ADVISORY NO. 21 NAME 1821 JEBI ANALYSIS POSITION 020000UTC 22.7N 136.0E MOVEMENT NNW 11KT PRES/VMAX 935HPA 95KT FORECAST 24HR POSITION 030000UTC 26.1N 133.4E WITHIN 60NM PRES/VMAX 955HPA 78KT 48HR POSITION 040000UTC 30.9N 132.9E WITHIN 90NM PRES/VMAX 975HPA 62KT 72HR POSITION 050000UTC 43.0N 138.7E WITHIN 135NM PRES/VMAX 985HPA 52KT 96HR POSITION 060000UTC 52.0N 138.4E WITHIN 0NM PRES/VMAX 990HPA 47KT KOREA METEOROLOGICAL ADMINISTRATION.