WTJP21 RJTD 151800 WARNING 151800. WARNING VALID 161800. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1704 TALAS (1704) 996 HPA AT 17.7N 109.9E SOUTH CHINA SEA MOVING WESTNORTHWEST 08 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 240 MILES SOUTHEAST SEMICIRCLE AND 180 MILES ELSEWHERE. FORECAST POSITION FOR 160600UTC AT 18.3N 108.2E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 161800UTC AT 18.8N 106.1E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 171800UTC AT 20.1N 100.4E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=