WTJP31 RJTD 230900 WARNING 230900. WARNING VALID 240900. STORM WARNING. SEVERE TROPICAL STORM 1819 SOULIK (1819) 975 HPA AT 34.0N 126.0E YELLOW SEA MOVING NORTHNORTHEAST 09 KNOTS. POSITION GOOD. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 60 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES NORTHEAST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 232100UTC AT 36.3N 128.0E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS. FORECAST POSITION FOR 240900UTC AT 39.5N 131.2E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=