WTJP21 RJTD 050600 WARNING 050600. WARNING VALID 060600. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. TYPHOON 2521 MATMO (2521) 975 HPA AT 20.8N 110.5E SOUTH CHINA SEA MOVING WESTNORTHWEST 11 KNOTS. POSITION GOOD. MAX WINDS 65 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 40 MILES. RADIUS OF OVER 30 KNOT WINDS 210 MILES SOUTHEAST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 051800UTC AT 21.7N 108.4E WITH 25 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 060600UTC AT 22.4N 106.4E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 35 KNOTS. EXTENDED OUTLOOK. FORECAST POSITION FOR 070600UTC AT 22.5N 104.3E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1006 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=