WTJP21 RJTD 181800 WARNING 181800. WARNING VALID 191800. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 2517 MITAG (2517) 1002 HPA AT 21.2N 116.7E SOUTH CHINA SEA MOVING NORTHWEST 12 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 190600UTC AT 22.5N 115.4E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 191800UTC AT 23.2N 114.0E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=