WTJP21 RJTD 160600 WARNING 160600. WARNING VALID 170600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 2604 SINLAKU (2604) 945 HPA AT 17.8N 144.5E MARIANAS MOVING NORTH 06 KNOTS. POSITION GOOD. MAX WINDS 85 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 120 MILES. RADIUS OF OVER 30 KNOT WINDS 300 MILES SOUTH SEMICIRCLE AND 270 MILES ELSEWHERE. FORECAST POSITION FOR 170600UTC AT 20.3N 145.7E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 960 HPA, MAX WINDS 75 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 180600UTC AT 23.6N 146.9E WITH 55 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 190600UTC AT 27.9N 151.3E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 200600UTC AT 29.7N 161.8E WITH 125 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 976 HPA, MAX WINDS 60 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=