WTJP31 RJTD 302100 WARNING 302100. WARNING VALID 312100. TYPHOON WARNING. TROPICAL STORM 1604 NIDA (1604) 990 HPA AT 16.8N 123.5E SEA EAST OF PHILIPPINES MOVING WESTNORTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 310900UTC AT 18.4N 121.8E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 312100UTC AT 19.6N 119.6E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=