WTJP21 RJTD 211800 WARNING 211800. WARNING VALID 221800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 990 HPA AT 28.8N 133.1E SEA SOUTH OF JAPAN MOVING SOUTHSOUTHWEST 07 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 221800UTC AT 28.5N 132.9E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 231800UTC AT 28.2N 132.7E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 241800UTC AT 27.9N 132.5E WITH 170 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 70 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=