WTJP31 RJTD 140900 WARNING 140900. WARNING VALID 150900. STORM WARNING. TROPICAL STORM 1503 BAVI (1503) 990 HPA AT 12.5N 151.8E TRUKS MOVING WESTNORTHWEST 18 KNOTS. POSITION FAIR. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 270 MILES NORTHWEST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 142100UTC AT 13.2N 148.8E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 150900UTC AT 13.3N 145.8E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=