WTJP31 RJTD 240300 WARNING 240300. WARNING VALID 250300. STORM WARNING. SEVERE TROPICAL STORM 1819 SOULIK (1819) 985 HPA AT 37.7N 129.6E SEA OF JAPAN MOVING NORTHEAST 20 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 240 MILES SOUTH SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 241500UTC AT 40.6N 132.8E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS. FORECAST POSITION FOR 250300UTC AT 42.8N 137.0E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 40 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=