WTJP21 RJTD 270600 WARNING 270600. WARNING VALID 280600. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 2420 TRAMI (2420) DOWNGRADED FROM SEVERE TROPICAL STORM 990 HPA AT 15.7N 107.6E VIETNAM MOVING SOUTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 45 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 270 MILES NORTH SEMICIRCLE AND 240 MILES ELSEWHERE. FORECAST POSITION FOR 271800UTC AT 15.0N 108.9E WITH 45 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 280600UTC AT 15.7N 109.4E WITH 65 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA, MAX WINDS 35 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 290600UTC AT 16.8N 110.1E WITH 115 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=