WTJP32 RJTD 170900 WARNING 170900. WARNING VALID 180900. TYPHOON WARNING. TYPHOON 1621 SARIKA (1621) 965 HPA AT 17.5N 112.5E SOUTH CHINA SEA MOVING WESTNORTHWEST 12 KNOTS. POSITION GOOD. MAX WINDS 75 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 40 MILES. RADIUS OF OVER 30 KNOT WINDS 210 MILES. FORECAST POSITION FOR 172100UTC AT 18.4N 111.1E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 85 KNOTS NEAR CENTER. FORECAST POSITION FOR 180900UTC AT 19.3N 109.8E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 75 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=