WTJP31 RJTD 301500 WARNING 301500. WARNING VALID 311500. STORM WARNING. TROPICAL STORM 1604 NIDA (1604) 992 HPA AT 16.6N 124.0E SEA EAST OF PHILIPPINES MOVING WESTNORTHWEST 13 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 310300UTC AT 18.1N 122.5E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 311500UTC AT 19.1N 120.7E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=