SVR STRM WRNG - ST. JOSEPH CNTY IN IN UNTL 515P : AT 414P NWS 88D INDCTD A SVR STRM CAPBL OF PRDCNG NICKEL SIZE HAIL AND DMGG WINDS IN EXCESS OF 60. THIS SVR STRM WAS LOCATED NR WALKERTON OR ABT 11 MI NW OF PLYMOUTH AND MVNG NE AT 15.