WTJP34 RJTD 270300 WARNING 270300. WARNING VALID 280300. STORM WARNING. SEVERE TROPICAL STORM 1709 NESAT (1709) 990 HPA AT 17.7N 127.5E SEA EAST OF PHILIPPINES MOVING NORTH SLOWLY. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 180 MILES SOUTHWEST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 271500UTC AT 19.4N 126.8E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 280300UTC AT 20.6N 125.9E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=