WTJP21 RJTD 171800 WARNING 171800. WARNING VALID 181800. WARNING IS UPDATED EVERY 6 HOURS. STORM WARNING. SEVERE TROPICAL STORM 1718 TALIM (1718) 980 HPA AT 37.6N 138.4E SEA OF JAPAN MOVING NORTHEAST 37 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS. RADIUS OF OVER 30 KNOT WINDS 325 MILES EAST SEMICIRCLE AND 270 MILES ELSEWHERE. FORECAST POSITION FOR 180600UTC AT 43.8N 141.5E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 60 KNOTS. FORECAST POSITION FOR 181800UTC AT 47.9N 144.4E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 966 HPA, MAX WINDS 60 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=