WTJP32 RJTD 130300 WARNING 130300. WARNING VALID 140300. STORM WARNING. SEVERE TROPICAL STORM 1815 LEEPI (1815) UPGRADED FROM TROPICAL STORM 996 HPA AT 25.9N 139.2E OGASAWARA SHOTO MOVING NORTHWEST 12 KNOTS. POSITION FAIR. MAX WINDS 50 KNOTS NEAR CENTER. RADIUS OF OVER 30 KNOT WINDS 150 MILES NORTHEAST SEMICIRCLE AND 90 MILES ELSEWHERE. FORECAST POSITION FOR 131500UTC AT 27.8N 136.5E WITH 40 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 996 HPA, MAX WINDS 50 KNOTS NEAR CENTER. FORECAST POSITION FOR 140300UTC AT 29.9N 132.8E WITH 60 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE. 998 HPA, MAX WINDS 40 KNOTS NEAR CENTER. JAPAN METEOROLOGICAL AGENCY.=