WTJP21 RJTD 180000 WARNING 180000. WARNING VALID 190000. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1501 MEKKHALA (1501) 996 HPA AT 13.5N 123.8E PHILIPPINES MOVING NORTHWEST 12 KNOTS. POSITION GOOD. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 181200UTC AT 14.4N 122.6E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 35 KNOTS NEAR CENTER. FORECAST POSITION FOR 190000UTC AT 15.3N 121.9E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA, MAX WINDS 35 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 200000UTC AT 16.3N 121.7E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1008 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=