WTKO20 RKSL 241500 KMA TROPICAL CYCLONE ADVISORY NO. 42 NAME 1515 GONI ANALYSIS POSITION 241500UTC 30.5N 129.4E MOVEMENT NNE 23KT PRES/VMAX 940HPA 91KT FORECAST 12HR POSITION 250300UTC 34.2N 130.4E WITHIN 30NM PRES/VMAX 955HPA 78KT 24HR POSITION 251500UTC 36.4N 131.0E WITHIN 75NM PRES/VMAX 970HPA 68KT 36HR POSITION 260300UTC 39.5N 131.4E WITHIN 100NM PRES/VMAX 980HPA 56KT 48HR POSITION 261500UTC 41.6N 131.1E WITHIN 0NM PRES 990HPA KOREA METEOROLOGICAL ADMINISTRATION.