WTJP31 RJTD 142100 WARNING 142100. WARNING VALID 152100. TYPHOON WARNING. TYPHOON 1822 MANGKHUT (1822) 925 HPA AT 18.1N 121.5E PHILIPPINES MOVING WEST 17 KNOTS. POSITION GOOD. MAX WINDS 100 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 90 MILES. RADIUS OF OVER 30 KNOT WINDS 400 MILES EAST SEMICIRCLE AND 300 MILES ELSEWHERE. FORECAST POSITION FOR 150900UTC AT 18.9N 118.8E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 945 HPA, MAX WINDS 85 KNOTS NEAR CENTER. FORECAST POSITION FOR 152100UTC AT 20.2N 116.0E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 80 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=