WTJP32 RJTD 200900 WARNING 200900. WARNING VALID 210900. TYPHOON WARNING. SEVERE TROPICAL STORM 1820 CIMARON (1820) 985 HPA AT 17.6N 147.7E MARIANAS MOVING WESTNORTHWEST 09 KNOTS. POSITION FAIR. MAX WINDS 55 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 50 MILES. RADIUS OF OVER 30 KNOT WINDS 300 MILES SOUTHEAST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 202100UTC AT 18.9N 145.8E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 210900UTC AT 21.0N 143.3E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 970 HPA, MAX WINDS 70 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=