WTJP21 RJTD 200600 WARNING 200600. WARNING VALID 210600. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 994 HPA AT 31.3N 137.2E SEA SOUTH OF JAPAN MOVING WESTSOUTHWEST 13 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 201800UTC AT 30.4N 135.5E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 210600UTC AT 30.0N 133.4E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 220600UTC AT 29.0N 132.3E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 230600UTC AT 27.8N 132.4E WITH 170 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=