WTJP21 RJTD 211200 WARNING 211200. WARNING VALID 221200. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 2404 PRAPIROON (2404) 998 HPA AT 17.5N 110.6E SOUTH CHINA SEA MOVING NORTHNORTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 90 MILES. FORECAST POSITION FOR 221200UTC AT 20.2N 108.8E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 35 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 231200UTC AT 22.0N 108.0E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=