WTJP23 RJTD 160600 WARNING 160600. WARNING VALID 170600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1511 NANGKA (1511) 960 HPA AT 32.0N 134.6E SEA SOUTH OF JAPAN MOVING NORTH 10 KNOTS. POSITION GOOD. MAX WINDS 75 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 100 MILES SOUTHEAST SEMICIRCLE AND 80 MILES ELSEWHERE. RADIUS OF OVER 30 KNOT WINDS 375 MILES SOUTHEAST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 161800UTC AT 34.3N 133.7E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 170600UTC AT 35.9N 133.3E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 180600UTC AT 39.1N 135.4E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=