WTKO20 RKSL 311800 KMA TROPICAL CYCLONE ADVISORY NO. 27 NAME 1803 JELAWAT ANALYSIS POSITION 311800UTC 19.2N 143.1E MOVEMENT E 6KT PRES/VMAX 980HPA 56KT FORECAST 24HR POSITION 011800UTC 19.7N 145.2E WITHIN 75NM PRES/VMAX 992HPA 45KT 48HR POSITION 021800UTC 19.5N 147.5E WITHIN 125NM PRES/VMAX 996HPA 39KT 72HR POSITION 031800UTC 19.8N 150.5E WITHIN 0NM PRES 1000HPA KOREA METEOROLOGICAL ADMINISTRATION.