WTKO20 RKSL 300600 KMA TROPICAL CYCLONE ADVISORY NO. 10 NAME 1821 JEBI ANALYSIS POSITION 300600UTC 17.7N 148.2E MOVEMENT W 10KT PRES/VMAX 950HPA 84KT FORECAST 24HR POSITION 310600UTC 18.6N 143.6E WITHIN 60NM PRES/VMAX 940HPA 91KT 48HR POSITION 010600UTC 20.9N 139.2E WITHIN 90NM PRES/VMAX 930HPA 97KT 72HR POSITION 020600UTC 24.0N 136.0E WITHIN 135NM PRES/VMAX 935HPA 95KT 96HR POSITION 030600UTC 27.6N 134.4E WITHIN 180NM PRES/VMAX 940HPA 91KT 120HR POSITION 040600UTC 31.1N 134.9E WITHIN 245NM PRES/VMAX 950HPA 84KT KOREA METEOROLOGICAL ADMINISTRATION.