WTJP23 RJTD 161200 WARNING 161200. WARNING VALID 171200. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1511 NANGKA (1511) 960 HPA AT 33.0N 134.3E SEA SOUTH OF JAPAN MOVING NORTH 10 KNOTS. POSITION GOOD. MAX WINDS 70 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 100 MILES SOUTHEAST SEMICIRCLE AND 80 MILES ELSEWHERE. RADIUS OF OVER 30 KNOT WINDS 350 MILES SOUTHEAST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 170000UTC AT 35.0N 133.4E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 171200UTC AT 36.6N 133.6E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 181200UTC AT 39.7N 136.3E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=