The pilot of a tailwheel-equipped airplane reported that during the final approach, the airplane was too low, which he failed to notice and correct. Subsequently, the airplane landed short of the runway threshold in about 3 feet of snow and nosed over.
The airplane sustained substantial damage to the left lift strut, firewall, and empennage.
The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.