WTJP22 RJTD 030000 WARNING 030000. WARNING VALID 040000. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1618 CHABA (1618) 925 HPA AT 23.8N 127.6E SOUTH OF OKINAWA MOVING NORTHNORTHWEST 12 KNOTS. POSITION GOOD. MAX WINDS 100 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 70 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES NORTHEAST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 031200UTC AT 26.0N 126.8E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 925 HPA, MAX WINDS 100 KNOTS NEAR CENTER. FORECAST POSITION FOR 040000UTC AT 28.1N 126.3E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 935 HPA, MAX WINDS 95 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 050000UTC AT 34.2N 128.4E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 060000UTC AT 39.4N 147.9E WITH 220 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 40 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=