WTJP21 RJTD 061200 WARNING 061200. WARNING VALID 071200. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2503 MUN (2503) 990 HPA AT 33.3N 149.6E SEA EAST OF JAPAN MOVING NORTHNORTHEAST 06 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES SOUTHEAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 071200UTC AT 37.0N 148.0E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 40 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 081200UTC AT 41.5N 153.3E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=