WTJP21 RJTD 231200 WARNING 231200. WARNING VALID 241200. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 2420 TRAMI (2420) 985 HPA AT 16.8N 123.0E SEA EAST OF PHILIPPINES MOVING NORTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 400 MILES NORTH SEMICIRCLE AND 250 MILES ELSEWHERE. FORECAST POSITION FOR 240000UTC AT 17.1N 120.7E WITH 45 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 241200UTC AT 17.2N 119.7E WITH 65 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 251200UTC AT 17.5N 116.0E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 261200UTC AT 17.3N 112.1E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 271200UTC AT 17.0N 110.4E WITH 125 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 281200UTC AT 15.8N 109.0E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=