WTJP33 RJTD 210900 WARNING 210900. WARNING VALID 220900. STORM WARNING. SEVERE TROPICAL STORM 1609 MINDULLE (1609) 985 HPA AT 30.8N 139.7E SEA SOUTH OF JAPAN MOVING NORTHNORTHWEST 21 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 130 MILES. FORECAST POSITION FOR 212100UTC AT 33.8N 138.9E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 220900UTC AT 36.9N 140.0E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS. JAPAN METEOROLOGICAL AGENCY.=