WTJP21 RJTD 181200 WARNING 181200. WARNING VALID 191200. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 2517 MITAG (2517) 1002 HPA AT 20.3N 117.5E SOUTH CHINA SEA MOVING WESTNORTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 180 MILES EAST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 190000UTC AT 21.9N 115.8E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 191200UTC AT 22.7N 114.8E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA, MAX WINDS 35 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 201200UTC AT 23.1N 113.1E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=