WTJP33 RJTD 040300 WARNING 040300. WARNING VALID 050300. STORM WARNING. SEVERE TROPICAL STORM 2311 HAIKUI (2311) 990 HPA AT 23.1N 119.4E TAIWAN STRAIT MOVING NORTHWEST SLOWLY. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 210 MILES NORTH SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 041500UTC AT 23.5N 118.3E WITH 35 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 45 KNOTS NEAR CENTER. FORECAST POSITION FOR 050300UTC AT 23.8N 117.1E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 994 HPA, MAX WINDS 35 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=