WTJP33 RJTD 020900 WARNING 020900. WARNING VALID 030900. STORM WARNING. SEVERE TROPICAL STORM 2509 KROSA (2509) 975 HPA AT 37.9N 144.9E SEA EAST OF JAPAN MOVING NORTHEAST 15 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 210 MILES SOUTHEAST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 022100UTC AT 39.2N 149.1E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 030900UTC AT 40.3N 154.8E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=