WTJP31 RJTD 160900 WARNING 160900. WARNING VALID 170900. TYPHOON WARNING. TYPHOON 1822 MANGKHUT (1822) 960 HPA AT 22.0N 112.7E SOUTH CHINA MOVING WESTNORTHWEST 18 KNOTS. POSITION GOOD. MAX WINDS 75 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 120 MILES. RADIUS OF OVER 30 KNOT WINDS 375 MILES EAST SEMICIRCLE AND 210 MILES ELSEWHERE. FORECAST POSITION FOR 162100UTC AT 22.8N 109.4E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 985 HPA, MAX WINDS 55 KNOTS NEAR CENTER. FORECAST POSITION FOR 170900UTC AT 23.7N 106.8E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 35 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=