WTJP31 RJTD 120300 WARNING 120300. WARNING VALID 130300. STORM WARNING. SEVERE TROPICAL STORM 1506 NOUL (1506) DOWNGRADED FROM TYPHOON 990 HPA AT 29.0N 130.6E SEA SOUTH OF JAPAN MOVING NORTHEAST 35 KNOTS. POSITION FAIR. MAX WINDS 60 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 45 MILES. RADIUS OF OVER 30 KNOT WINDS 100 MILES. FORECAST POSITION FOR 121500UTC AT 35.0N 138.5E WITH 85 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 50 KNOTS. FORECAST POSITION FOR 130300UTC AT 43.5N 146.5E WITH 130 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 990 HPA, MAX WINDS 50 KNOTS. BECOMING EXTRATROPICAL LOW. JAPAN METEOROLOGICAL AGENCY.=