WTJP31 RJTD 310900 WARNING 310900. WARNING VALID 010900. TYPHOON WARNING. TYPHOON 1504 MAYSAK (1504) 915 HPA AT 10.1N 140.6E MARIANAS MOVING WEST 13 KNOTS. POSITION GOOD. MAX WINDS 105 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 90 MILES. RADIUS OF OVER 30 KNOT WINDS 210 MILES NORTH SEMICIRCLE AND 180 MILES ELSEWHERE. FORECAST POSITION FOR 312100UTC AT 10.6N 138.4E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 910 HPA, MAX WINDS 110 KNOTS NEAR CENTER. FORECAST POSITION FOR 010900UTC AT 11.2N 136.4E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 905 HPA, MAX WINDS 110 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=