WTJP33 RJTD 261500 WARNING 261500. WARNING VALID 271500. TYPHOON WARNING. SEVERE TROPICAL STORM 2509 KROSA (2509) 980 HPA AT 18.7N 145.4E MARIANAS MOVING NORTHEAST 08 KNOTS. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 60 MILES. RADIUS OF OVER 30 KNOT WINDS 350 MILES SOUTHWEST SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 270300UTC AT 21.5N 145.6E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 271500UTC AT 23.9N 145.8E WITH 57 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=