WTJP23 RJTD 241800 WARNING 241800. WARNING VALID 251800. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1708 SONCA (1708) 994 HPA AT 16.9N 109.5E SOUTH CHINA SEA MOVING WEST SLOWLY. POSITION FAIR. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 60 MILES. FORECAST POSITION FOR 251800UTC AT 17.4N 105.7E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=