WTJP31 RJTD 030300 WARNING 030300. WARNING VALID 040300. TYPHOON WARNING. TYPHOON 1612 NAMTHEUN (1612) 955 HPA AT 29.5N 130.1E SEA SOUTH OF JAPAN MOVING NORTHNORTHWEST 08 KNOTS. POSITION GOOD. MAX WINDS 75 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 20 MILES. RADIUS OF OVER 30 KNOT WINDS 90 MILES NORTHEAST SEMICIRCLE AND 60 MILES ELSEWHERE. FORECAST POSITION FOR 031500UTC AT 30.3N 129.4E WITH 30 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 955 HPA, MAX WINDS 75 KNOTS NEAR CENTER. FORECAST POSITION FOR 040300UTC AT 31.1N 129.0E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 960 HPA, MAX WINDS 70 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=