WTJP21 RJTD 120600 WARNING 120600. WARNING VALID 130600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1614 MERANTI (1614) 920 HPA AT 18.3N 129.4E SEA EAST OF PHILIPPINES MOVING WESTNORTHWEST 12 KNOTS. POSITION GOOD. MAX WINDS 100 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 60 MILES. RADIUS OF OVER 30 KNOT WINDS 120 MILES. FORECAST POSITION FOR 121800UTC AT 18.9N 126.4E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 915 HPA, MAX WINDS 105 KNOTS NEAR CENTER. FORECAST POSITION FOR 130600UTC AT 19.6N 123.9E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 910 HPA, MAX WINDS 110 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 140600UTC AT 20.9N 119.4E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 915 HPA, MAX WINDS 105 KNOTS NEAR CENTER. FORECAST POSITION FOR 150600UTC AT 22.6N 115.8E WITH 130 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 930 HPA, MAX WINDS 95 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=