WTJP24 RJTD 151200 WARNING 151200. WARNING VALID 161200. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1818 RUMBIA (1818) 996 HPA AT 29.3N 125.7E EAST CHINA SEA MOVING NORTHNORTHWEST 12 KNOTS. POSITION FAIR. MAX WINDS 35 KNOTS. RADIUS OF OVER 30 KNOT WINDS 180 MILES SOUTHEAST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 160000UTC AT 30.3N 124.3E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 35 KNOTS. FORECAST POSITION FOR 161200UTC AT 30.4N 122.5E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 40 KNOTS. EXTENDED OUTLOOK. FORECAST POSITION FOR 171200UTC AT 30.6N 117.7E WITH 95 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 35 KNOTS. FORECAST POSITION FOR 181200UTC AT 31.4N 114.9E WITH 130 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=