WTJP21 RJTD 021200 WARNING 021200. WARNING VALID 031200. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1604 NIDA (1604) 990 HPA AT 23.9N 110.7E SOUTH CHINA MOVING WESTNORTHWEST 12 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 180 MILES. FORECAST POSITION FOR 030000UTC AT 24.3N 108.7E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA. BECOMING TROPICAL DEPRESSION. FORECAST POSITION FOR 031200UTC AT 24.3N 107.2E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=