WTJP32 RJTD 031500 WARNING 031500. WARNING VALID 041500. STORM WARNING. SEVERE TROPICAL STORM 1510 LINFA (1510) 985 HPA AT 15.3N 125.1E SEA EAST OF PHILIPPINES MOVING WEST 06 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 180 MILES SOUTH SEMICIRCLE AND 120 MILES ELSEWHERE. FORECAST POSITION FOR 041500UTC AT 17.0N 123.9E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 980 HPA, MAX WINDS 55 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=