WTJP23 RJTD 111800 WARNING 111800. WARNING VALID 121800. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1511 NANGKA (1511) 950 HPA AT 18.3N 138.1E SEA EAST OF PHILIPPINES MOVING WEST 07 KNOTS. POSITION FAIR. MAX WINDS 80 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 80 MILES. RADIUS OF OVER 30 KNOT WINDS 270 MILES NORTHEAST SEMICIRCLE AND 210 MILES ELSEWHERE. FORECAST POSITION FOR 121800UTC AT 19.2N 137.9E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 945 HPA, MAX WINDS 80 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 131800UTC AT 21.4N 137.9E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 935 HPA, MAX WINDS 95 KNOTS NEAR CENTER. FORECAST POSITION FOR 141800UTC AT 25.1N 137.2E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 925 HPA, MAX WINDS 100 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=