WTJP21 RJTD 180600 WARNING 180600. WARNING VALID 190600. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1501 MEKKHALA (1501) 998 HPA AT 13.9N 122.8E PHILIPPINES MOVING WESTNORTHWEST 10 KNOTS. POSITION GOOD. MAX WINDS 35 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 181800UTC AT 14.8N 121.7E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA, MAX WINDS 35 KNOTS NEAR CENTER. FORECAST POSITION FOR 190600UTC AT 15.9N 121.3E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1002 HPA, MAX WINDS 35 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 200600UTC AT 16.6N 121.2E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1008 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=