WTKO20 RKSL 281200 KMA TROPICAL CYCLONE ADVISORY NO. 3 NAME 1821 JEBI ANALYSIS POSITION 281200UTC 16.5N 155.5E MOVEMENT WNW 9KT PRES/VMAX 998HPA 39KT FORECAST 24HR POSITION 291200UTC 17.3N 151.7E WITHIN 60NM PRES/VMAX 990HPA 47KT 48HR POSITION 301200UTC 17.7N 147.7E WITHIN 90NM PRES/VMAX 980HPA 56KT 72HR POSITION 311200UTC 19.2N 143.5E WITHIN 135NM PRES/VMAX 965HPA 72KT 96HR POSITION 011200UTC 21.1N 139.8E WITHIN 180NM PRES/VMAX 955HPA 78KT 120HR POSITION 021200UTC 23.6N 136.7E WITHIN 245NM PRES/VMAX 950HPA 84KT KOREA METEOROLOGICAL ADMINISTRATION.