WTJP31 RJTD 202100 WARNING 202100. WARNING VALID 212100. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 994 HPA AT 30.1N 134.8E SEA SOUTH OF JAPAN MOVING WESTSOUTHWEST 07 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 210900UTC AT 29.5N 133.5E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 212100UTC AT 29.2N 133.2E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=