WTJP31 RJTD 312100 WARNING 312100. WARNING VALID 012100. TYPHOON WARNING. TYPHOON 1705 NORU (1705) 930 HPA AT 23.5N 138.5E SEA SOUTH OF JAPAN MOVING WESTNORTHWEST SLOWLY. POSITION GOOD. MAX WINDS 100 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 90 MILES. RADIUS OF OVER 30 KNOT WINDS 150 MILES. FORECAST POSITION FOR 012100UTC AT 24.7N 136.9E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 935 HPA, MAX WINDS 90 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=