WTJP31 RJTD 302100 WARNING 302100. WARNING VALID 312100. TYPHOON WARNING. TYPHOON 1803 JELAWAT (1803) 950 HPA AT 17.7N 140.1E MARIANAS MOVING NORTHEAST 10 KNOTS. POSITION GOOD. MAX WINDS 85 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 60 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES NORTH SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 310900UTC AT 18.9N 141.5E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 965 HPA, MAX WINDS 75 KNOTS NEAR CENTER. FORECAST POSITION FOR 312100UTC AT 19.2N 142.8E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 975 HPA, MAX WINDS 65 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=