WTJP33 RJTD 131500 WARNING 131500. WARNING VALID 141500. TYPHOON WARNING. SEVERE TROPICAL STORM 2407 AMPIL (2407) 985 HPA AT 25.5N 139.1E SEA SOUTH OF JAPAN MOVING NORTHEAST SLOWLY. POSITION FAIR. MAX WINDS 55 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 30 MILES. RADIUS OF OVER 30 KNOT WINDS 120 MILES EAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 141500UTC AT 27.8N 140.2E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 65 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=