WTJP23 RJTD 040000 WARNING 040000. WARNING VALID 050000. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1511 NANGKA (1511) 998 HPA AT 10.3N 170.3E MARSHALLS MOVING NORTH 09 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 041200UTC AT 10.6N 168.2E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 050000UTC AT 11.1N 165.5E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 45 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 060000UTC AT 12.2N 160.3E WITH 140 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 070000UTC AT 14.1N 155.6E WITH 210 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=