WTJP21 RJTD 120000 WARNING 120000. WARNING VALID 130000. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1702 MERBOK (1702) 998 HPA AT 20.1N 114.9E SOUTH CHINA SEA MOVING NORTHWEST 12 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 90 MILES. FORECAST POSITION FOR 121200UTC AT 21.9N 114.4E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 130000UTC AT 23.8N 114.6E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=