WTJP21 RJTD 111800 WARNING 111800. WARNING VALID 121800. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1702 MERBOK (1702) 1000 HPA AT 19.3N 115.8E SOUTH CHINA SEA MOVING NORTHNORTHWEST 13 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 90 MILES. FORECAST POSITION FOR 120600UTC AT 21.4N 115.1E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA, MAX WINDS 40 KNOTS NEAR CENTER. FORECAST POSITION FOR 121800UTC AT 23.1N 115.0E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA, MAX WINDS 35 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 131800UTC AT 26.1N 120.0E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=