WTJP32 RJTD 042100 WARNING 042100. WARNING VALID 052100. TYPHOON WARNING. TYPHOON 1813 SHANSHAN (1813) 970 HPA AT 22.8N 147.5E OGASAWARA SHOTO MOVING NORTHNORTHWEST 09 KNOTS. POSITION FAIR. MAX WINDS 70 KNOTS NEAR CENTER. RADIUS OF OVER 50 KNOT WINDS 55 MILES. RADIUS OF OVER 30 KNOT WINDS 300 MILES SOUTHEAST SEMICIRCLE AND 150 MILES ELSEWHERE. FORECAST POSITION FOR 050900UTC AT 24.8N 146.7E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 955 HPA, MAX WINDS 80 KNOTS NEAR CENTER. FORECAST POSITION FOR 052100UTC AT 26.5N 145.8E WITH 50 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 950 HPA, MAX WINDS 85 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=