WTJP31 RJTD 200300 WARNING 200300. WARNING VALID 210300. STORM WARNING. TROPICAL STORM 1610 LIONROCK (1610) 994 HPA AT 31.3N 137.9E 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 201500UTC AT 30.6N 136.0E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 210300UTC AT 30.2N 134.0E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=