WTJP24 RJTD 271800 WARNING 271800. WARNING VALID 281800. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. SEVERE TROPICAL STORM 1709 NESAT (1709) 985 HPA AT 19.9N 126.3E SEA EAST OF PHILIPPINES MOVING NORTHNORTHWEST 09 KNOTS. POSITION FAIR. MAX WINDS 55 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 30 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES SOUTHWEST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 280600UTC AT 20.7N 124.9E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 281800UTC AT 21.6N 123.3E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 291800UTC AT 23.1N 120.5E WITH 95 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 301800UTC AT 24.7N 118.1E WITH 130 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=