WTJP21 RJTD 150600 WARNING 150600. WARNING VALID 160600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 2604 SINLAKU (2604) 935 HPA AT 16.0N 144.9E MARIANAS MOVING NORTHWEST SLOWLY. POSITION GOOD. MAX WINDS 90 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 90 MILES. RADIUS OF OVER 30 KNOT WINDS 325 MILES. FORECAST POSITION FOR 160600UTC AT 17.9N 144.4E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 945 HPA, MAX WINDS 85 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 170600UTC AT 20.5N 145.7E WITH 55 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 960 HPA, MAX WINDS 75 KNOTS NEAR CENTER. FORECAST POSITION FOR 180600UTC AT 23.7N 147.2E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 190600UTC AT 27.5N 151.9E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 200600UTC AT 29.6N 162.9E WITH 180 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 974 HPA, MAX WINDS 60 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=