WTJP32 RJTD 032100 WARNING 032100. WARNING VALID 042100. TYPHOON WARNING. TYPHOON 1618 CHABA (1618) 915 HPA AT 27.3N 126.3E EAST CHINA SEA MOVING NORTHNORTHWEST 10 KNOTS. POSITION GOOD. MAX WINDS 105 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 120 MILES NORTHEAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 040900UTC AT 30.2N 125.9E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 945 HPA, MAX WINDS 90 KNOTS NEAR CENTER. FORECAST POSITION FOR 042100UTC AT 33.3N 127.3E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 75 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=