WTJP21 RJTD 251800 WARNING 251800. WARNING VALID 261800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2420 TRAMI (2420) 985 HPA AT 17.2N 114.9E SOUTH CHINA SEA MOVING WEST 12 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 240 MILES. FORECAST POSITION FOR 260600UTC AT 17.5N 112.3E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 261800UTC AT 17.0N 110.1E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 271800UTC AT 16.0N 108.9E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 281800UTC AT 16.0N 109.4E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 35 KNOTS NEAR CENTER. FORECAST POSITION FOR 291800UTC AT 15.9N 110.8E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 35 KNOTS NEAR CENTER. FORECAST POSITION FOR 301800UTC AT 15.7N 113.4E WITH 180 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 35 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=