WTKO20 RKSL 031200 KMA TROPICAL CYCLONE ADVISORY NO. 7 NAME 1703 NANMADOL ANALYSIS POSITION 031200UTC 29.5N 126.1E MOVEMENT NE 21KT PRES/VMAX 985HPA 52KT FORECAST 12HR POSITION 040000UTC 32.8N 129.6E WITHIN 45NM PRES/VMAX 990HPA 47KT 24HR POSITION 041200UTC 35.0N 135.3E WITHIN 75NM PRES/VMAX 994HPA 41KT 36HR POSITION 050000UTC 35.8N 142.3E WITHIN 0NM PRES 998HPA KOREA METEOROLOGICAL ADMINISTRATION.