WTJP33 RJTD 161500 WARNING 161500. WARNING VALID 171500. STORM WARNING. SEVERE TROPICAL STORM 1816 BEBINCA (1816) 980 HPA AT 19.8N 106.8E GULF OF TONGKING MOVING WESTSOUTHWEST 10 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 90 MILES SOUTH SEMICIRCLE AND 60 MILES ELSEWHERE. FORECAST POSITION FOR 171500UTC AT 19.0N 104.7E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 992 HPA, MAX WINDS 35 KNOTS. JAPAN METEOROLOGICAL AGENCY.=