WTJP31 RJTD 170300 WARNING 170300. WARNING VALID 180300. STORM WARNING. SEVERE TROPICAL STORM 1712 BANYAN (1712) 992 HPA AT 41.7N 174.9E SEA SOUTH OF ALEUTIANS MOVING NORTHEAST 37 KNOTS. POSITION GOOD. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES SOUTHEAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 171500UTC AT 44.9N 179.5E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS. BECOMING EXTRATROPICAL LOW. FORECAST POSITION FOR 180300UTC AT 47.1N 178.0W WITH 80 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA, MAX WINDS 35 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=