WTJP22 RJTD 061800 WARNING 061800. WARNING VALID 071800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 1510 LINFA (1510) 990 HPA AT 20.0N 119.3E SOUTH CHINA SEA MOVING NORTH SLOWLY. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 210 MILES SOUTHWEST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 071800UTC AT 21.5N 119.8E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 081800UTC AT 22.7N 119.7E WITH 140 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 091800UTC AT 23.5N 118.8E WITH 180 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 40 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=