WTJP23 RJTD 090000 WARNING 090000. WARNING VALID 100000. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 0918 MELOR (0918) 980 HPA AT 42.3N 147.7E SEA EAST OF JAPAN MOVING EASTNORTHEAST 23 KNOTS. POSITION FAIR. MAX WINDS 55 KNOTS. RADIUS OF OVER 50 KNOT WINDS 100 MILES NORTHEAST SEMICIRCLE AND 80 MILES ELSEWHERE. RADIUS OF OVER 30 KNOT WINDS 500 MILES NORTHEAST SEMICIRCLE AND 425 MILES ELSEWHERE. FORECAST POSITION FOR 091200UTC AT 44.2N 152.6E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 986 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. FORECAST POSITION FOR 100000UTC AT 45.7N 157.9E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 986 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=