WTJP23 RJTD 170600 WARNING 170600. WARNING VALID 180600. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1511 NANGKA (1511) 994 HPA AT 35.7N 133.5E SEA OF JAPAN MOVING NORTH 08 KNOTS. POSITION GOOD. MAX WINDS 35 KNOTS. RADIUS OF OVER 30 KNOT WINDS 210 MILES. FORECAST POSITION FOR 171800UTC AT 37.6N 134.4E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA. BECOMING TROPICAL DEPRESSION. FORECAST POSITION FOR 180600UTC AT 39.4N 135.9E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1006 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=