WTJP21 RJTD 061800 WARNING 061800. WARNING VALID 071800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 2516 TAPAH (2516) 1000 HPA AT 18.4N 114.6E SOUTH CHINA SEA MOVING WESTNORTHWEST 07 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 070600UTC AT 19.4N 114.0E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 071800UTC AT 21.0N 112.8E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 081800UTC AT 23.2N 109.7E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=