WTJP32 RJTD 291500 WARNING 291500. WARNING VALID 301500. STORM WARNING. TROPICAL STORM 1618 CHABA (1618) 1000 HPA AT 13.6N 139.6E SEA EAST OF PHILIPPINES MOVING WEST 17 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 90 MILES. FORECAST POSITION FOR 300300UTC AT 14.7N 137.9E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 301500UTC AT 16.0N 136.3E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=