WTJP31 RJTD 040300 WARNING 040300. WARNING VALID 050300. TYPHOON WARNING. TYPHOON 1504 MAYSAK (1504) 975 HPA AT 14.7N 126.0E SEA EAST OF PHILIPPINES MOVING WEST 13 KNOTS. POSITION FAIR. MAX WINDS 65 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 150 MILES NORTH SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 041500UTC AT 16.0N 123.6E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 050300UTC AT 17.5N 121.5E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=