WTJP31 RJTD 310900 WARNING 310900. WARNING VALID 010900. TYPHOON WARNING. TYPHOON 1803 JELAWAT (1803) 950 HPA AT 19.0N 141.6E MARIANAS MOVING EASTNORTHEAST 06 KNOTS. POSITION FAIR. MAX WINDS 85 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 60 MILES. RADIUS OF OVER 30 KNOT WINDS 150 MILES. FORECAST POSITION FOR 312100UTC AT 19.4N 142.9E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 60 KNOTS NEAR CENTER. FORECAST POSITION FOR 010900UTC AT 19.6N 144.3E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=