WTJP21 RJTD 050600 WARNING 050600. WARNING VALID 060600. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. TROPICAL STORM 2503 MUN (2503) 996 HPA AT 31.1N 147.0E SEA EAST OF JAPAN MOVING EAST SLOWLY. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 060600UTC AT 32.5N 149.4E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 070600UTC AT 35.2N 147.9E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 080600UTC AT 39.7N 148.0E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 35 KNOTS NEAR CENTER. FORECAST POSITION FOR 090600UTC AT 43.2N 154.6E WITH 200 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=