WTJP33 RJTD 291500 WARNING 291500. WARNING VALID 301500. STORM WARNING. SEVERE TROPICAL STORM 2509 KROSA (2509) 985 HPA AT 28.8N 142.7E OGASAWARA SHOTO MOVING NORTH SLOWLY. POSITION GOOD. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES SOUTHEAST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 301500UTC AT 28.9N 143.0E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=