WTJP31 RJTD 082100 WARNING 082100. WARNING VALID 092100. STORM WARNING. SEVERE TROPICAL STORM 2314 KOINU (2314) 996 HPA AT 21.7N 113.6E SOUTH CHINA SEA MOVING WEST SLOWLY. POSITION GOOD. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 60 MILES. FORECAST POSITION FOR 090900UTC AT 21.2N 111.9E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1008 HPA. BECOMING TROPICAL DEPRESSION. FORECAST POSITION FOR 092100UTC AT 20.3N 110.6E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1010 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=