WTJP23 RJTD 161800 WARNING 161800. WARNING VALID 171800. WARNING IS UPDATED EVERY 6 HOURS. GALE WARNING. TROPICAL STORM 1816 BEBINCA (1816) DOWNGRADED FROM SEVERE TROPICAL STORM 990 HPA AT 19.6N 106.3E GULF OF TONGKING MOVING WEST 09 KNOTS. POSITION FAIR. MAX WINDS 40 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 90 MILES SOUTH SEMICIRCLE AND 60 MILES ELSEWHERE. FORECAST POSITION FOR 171800UTC AT 19.1N 104.5E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 1000 HPA. BECOMING TROPICAL DEPRESSION. JAPAN METEOROLOGICAL AGENCY.=