WTJP21 RJTD 131800 WARNING 131800. WARNING VALID 141800. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 2604 SINLAKU (2604) 905 HPA AT 13.7N 147.1E MARIANAS MOVING NORTHNORTHWEST 07 KNOTS. POSITION GOOD. MAX WINDS 115 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 90 MILES. RADIUS OF OVER 30 KNOT WINDS 325 MILES NORTHEAST SEMICIRCLE AND 270 MILES ELSEWHERE. FORECAST POSITION FOR 141800UTC AT 15.5N 145.5E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 925 HPA, MAX WINDS 100 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 151800UTC AT 17.4N 144.3E WITH 55 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 935 HPA, MAX WINDS 90 KNOTS NEAR CENTER. FORECAST POSITION FOR 161800UTC AT 20.0N 144.8E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 80 KNOTS NEAR CENTER. FORECAST POSITION FOR 171800UTC AT 22.5N 146.3E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 181800UTC AT 26.1N 149.2E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=