WTJP23 RJTD 171200 WARNING 171200. WARNING VALID 181200. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1511 NANGKA (1511) 996 HPA AT 36.6N 134.6E SEA OF JAPAN MOVING NORTHEAST 13 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS. RADIUS OF OVER 30 KNOT WINDS 210 MILES. FORECAST POSITION FOR 180000UTC AT 38.8N 135.9E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA. BECOMING TROPICAL DEPRESSION. FORECAST POSITION FOR 181200UTC AT 40.5N 137.4E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1006 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=