WTJP31 RJTD 310300 WARNING 310300. WARNING VALID 010300. TYPHOON WARNING. TYPHOON 1803 JELAWAT (1803) 950 HPA AT 18.8N 141.0E MARIANAS MOVING EASTNORTHEAST 11 KNOTS. POSITION GOOD. 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 311500UTC AT 19.1N 142.1E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. FORECAST POSITION FOR 010300UTC AT 19.6N 143.5E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 50 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=