WTJP21 RJTD 190000 WARNING 190000. WARNING VALID 200000. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2604 SINLAKU (2604) 980 HPA AT 26.4N 149.4E SEA AROUND OF MINAMITORISIMA MOVING NORTHEAST 16 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 300 MILES SOUTHEAST SEMICIRCLE AND 180 MILES ELSEWHERE. FORECAST POSITION FOR 191200UTC AT 28.2N 153.0E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 200000UTC AT 29.1N 157.2E WITH 42 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 40 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 210000UTC AT 29.4N 166.6E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 35 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=