The pilot reported that during the landing roll in gusting, variable wind conditions, the airplane "suddenly" made a "strong" turn to the left. The airplane exited the runway to the left and the pilot applied left rudder to avoid hitting the windsock pole. The airplane entered tall grass, the nose wheel hit a hole, and the nose landing gear collapsed.

The pilot reported that there were no preaccident mechanical anomalies with the engine or airframe that would have precluded normal operation. The airplane sustained substantial damage to the firewall and left wing during the accident.