WTJP21 RJTD 020600 WARNING 020600. WARNING VALID 030600. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1604 NIDA (1604) DOWNGRADED FROM SEVERE TROPICAL STORM 985 HPA AT 23.4N 112.0E SOUTH CHINA MOVING WESTNORTHWEST 12 KNOTS. POSITION GOOD. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 180 MILES EAST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 021800UTC AT 24.1N 109.5E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 35 KNOTS. FORECAST POSITION FOR 030600UTC AT 24.4N 107.5E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=