WTJP23 RJTD 130600 WARNING 130600. WARNING VALID 140600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1511 NANGKA (1511) 950 HPA AT 20.5N 137.1E SEA SOUTH OF JAPAN MOVING NORTH 09 KNOTS. POSITION GOOD. MAX WINDS 80 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 90 MILES. RADIUS OF OVER 30 KNOT WINDS 240 MILES EAST SEMICIRCLE AND 210 MILES ELSEWHERE. FORECAST POSITION FOR 140600UTC AT 23.6N 137.0E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 935 HPA, MAX WINDS 90 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 150600UTC AT 27.5N 135.9E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 925 HPA, MAX WINDS 95 KNOTS NEAR CENTER. FORECAST POSITION FOR 160600UTC AT 30.8N 133.5E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 935 HPA, MAX WINDS 90 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=