WTJP33 RJTD 181500 WARNING 181500. WARNING VALID 191500. STORM WARNING. SEVERE TROPICAL STORM 2424 MAN-YI (2424) 985 HPA AT 18.9N 115.7E SOUTH CHINA SEA MOVING WEST 08 KNOTS. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 25 MILES. RADIUS OF OVER 30 KNOT WINDS 120 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 190300UTC AT 18.8N 113.5E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 191500UTC AT 18.3N 111.5E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1004 HPA, MAX WINDS 40 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=