WTJP31 RJTD 292100 WARNING 292100. WARNING VALID 302100. STORM WARNING. SEVERE TROPICAL STORM 1803 JELAWAT (1803) 980 HPA AT 15.6N 137.2E SEA EAST OF PHILIPPINES MOVING EAST 06 KNOTS. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 40 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES NORTH SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 302100UTC AT 17.9N 139.9E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 60 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=