WTJP31 RJTD 210300 WARNING 210300. WARNING VALID 220300. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 994 HPA AT 29.7N 133.9E SEA SOUTH OF JAPAN MOVING WESTSOUTHWEST 09 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 220300UTC AT 29.1N 133.2E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=