WTJP31 RJTD 172100 WARNING 172100. WARNING VALID 182100. STORM WARNING. SEVERE TROPICAL STORM 1718 TALIM (1718) 975 HPA AT 39.9N 139.4E SEA OF JAPAN MOVING NORTHNORTHEAST 45 KNOTS. POSITION FAIR. MAX WINDS 55 KNOTS. RADIUS OF OVER 50 KNOT WINDS 90 MILES NORTHEAST SEMICIRCLE AND 60 MILES ELSEWHERE. RADIUS OF OVER 30 KNOT WINDS 350 MILES SOUTHEAST SEMICIRCLE AND 270 MILES ELSEWHERE. FORECAST POSITION FOR 180900UTC AT 44.9N 141.9E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 60 KNOTS. FORECAST POSITION FOR 182100UTC AT 48.7N 144.9E WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 966 HPA, MAX WINDS 60 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=