WTJP21 RJTD 221800 WARNING 221800. WARNING VALID 231800. WARNING IS UPDATED EVERY 6 HOURS. TYPHOON WARNING. SEVERE TROPICAL STORM 2410 SHANSHAN (2410) 985 HPA AT 16.6N 141.3E MARIANAS ALMOST STATIONARY. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 30 MILES. RADIUS OF OVER 30 KNOT WINDS 150 MILES EAST SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 231800UTC AT 19.4N 140.9E WITH 57 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 70 KNOTS NEAR CENTER. EXTENDED OUTLOOK. FORECAST POSITION FOR 241800UTC AT 24.0N 139.6E WITH 100 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 75 KNOTS NEAR CENTER. FORECAST POSITION FOR 251800UTC AT 27.4N 136.0E WITH 120 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 80 KNOTS NEAR CENTER. FORECAST POSITION FOR 261800UTC AT 30.2N 134.1E WITH 150 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 80 KNOTS NEAR CENTER. FORECAST POSITION FOR 271800UTC AT 35.6N 136.3E WITH 180 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 960 HPA, MAX WINDS 75 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=