WTJP31 RJTD 230300 WARNING 230300. WARNING VALID 240300. STORM WARNING. SEVERE TROPICAL STORM 1819 SOULIK (1819) 975 HPA AT 33.2N 125.4E YELLOW SEA MOVING NORTHNORTHWEST 06 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 231500UTC AT 34.7N 126.4E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 240300UTC AT 37.7N 129.2E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=