WTJP21 RJTD 030600 WARNING 030600. WARNING VALID 040600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1504 MAYSAK (1504) 960 HPA AT 14.1N 130.0E SEA EAST OF PHILIPPINES MOVING WEST 11 KNOTS. POSITION GOOD. MAX WINDS 75 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 80 MILES NORTH SEMICIRCLE AND 50 MILES ELSEWHERE. RADIUS OF OVER 30 KNOT WINDS 180 MILES NORTH SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 031800UTC AT 14.3N 127.6E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 70 KNOTS NEAR CENTER. FORECAST POSITION FOR 040600UTC AT 15.0N 124.9E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 050600UTC AT 17.6N 120.6E WITH 140 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 060600UTC AT 18.9N 116.5E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=