WTJP21 RJTD 170600 WARNING 170600. WARNING VALID 180600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 1501 MEKKHALA (1501) 970 HPA AT 12.0N 126.0E SEA EAST OF PHILIPPINES MOVING WESTNORTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 65 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 210 MILES NORTH SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 171800UTC AT 12.6N 124.3E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 180600UTC AT 13.6N 122.6E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 40 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 190600UTC AT 14.9N 120.6E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=