WTJP34 RJTD 150900 WARNING 150900. WARNING VALID 160900. STORM WARNING. SEVERE TROPICAL STORM 2425 USAGI (2425) 992 HPA AT 21.0N 120.2E BASHI CHANNEL MOVING NORTHNORTHWEST 07 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 120 MILES EAST SEMICIRCLE AND 100 MILES ELSEWHERE. FORECAST POSITION FOR 152100UTC AT 22.4N 120.8E WITH 45 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 160900UTC AT 23.3N 122.1E WITH 65 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA, MAX WINDS 35 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=