WTJP32 RJTD 041500 WARNING 041500. WARNING VALID 051500. TYPHOON WARNING. TYPHOON 1618 CHABA (1618) 940 HPA AT 31.7N 126.3E EAST CHINA SEA MOVING NORTH 17 KNOTS. POSITION FAIR. MAX WINDS 90 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 210 MILES EAST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 050300UTC AT 35.0N 128.9E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 70 KNOTS NEAR CENTER. FORECAST POSITION FOR 051500UTC AT 37.8N 137.2E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=