WTJP31 RJTD 172100 WARNING 172100. WARNING VALID 182100. TYPHOON WARNING. TYPHOON 1515 GONI (1515) 935 HPA AT 18.0N 137.1E SEA EAST OF PHILIPPINES MOVING WESTNORTHWEST 15 KNOTS. POSITION GOOD. MAX WINDS 95 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 80 MILES. RADIUS OF OVER 30 KNOT WINDS 180 MILES. FORECAST POSITION FOR 180900UTC AT 18.5N 134.1E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 930 HPA, MAX WINDS 95 KNOTS NEAR CENTER. FORECAST POSITION FOR 182100UTC AT 18.9N 131.1E WITH 75 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 925 HPA, MAX WINDS 100 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=