WTKO20 RKSL 280000 KMA TROPICAL CYCLONE ADVISORY NO. 12 NAME 1803 JELAWAT ANALYSIS POSITION 280000UTC 11.7N 134.7E MOVEMENT NW 9KT PRES/VMAX 996HPA 39KT FORECAST 24HR POSITION 290000UTC 14.8N 134.8E WITHIN 75NM PRES/VMAX 990HPA 47KT 48HR POSITION 300000UTC 17.0N 135.4E WITHIN 125NM PRES/VMAX 985HPA 52KT 72HR POSITION 310000UTC 18.7N 137.1E WITHIN 175NM PRES/VMAX 990HPA 47KT 96HR POSITION 010000UTC 19.7N 139.1E WITHIN 250NM PRES/VMAX 992HPA 45KT 120HR POSITION 020000UTC 20.6N 141.4E WITHIN 295NM PRES/VMAX 998HPA 37KT KOREA METEOROLOGICAL ADMINISTRATION.