WTJP31 RJTD 031500 WARNING 031500. WARNING VALID 041500. TYPHOON WARNING. TYPHOON 1504 MAYSAK (1504) 965 HPA AT 14.1N 128.3E SEA EAST OF PHILIPPINES MOVING WEST 11 KNOTS. POSITION GOOD. MAX WINDS 70 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 040300UTC AT 14.9N 125.7E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 041500UTC AT 16.2N 123.4E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=