WTJP31 RJTD 290300 WARNING 290300. WARNING VALID 300300. TYPHOON WARNING. TYPHOON 1504 MAYSAK (1504) 970 HPA AT 07.5N 151.5E TRUKS MOVING WEST 09 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. FORECAST POSITION FOR 300300UTC AT 08.3N 146.4E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 85 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=