What happened
While approaching the airport for landing, the pilot encountered turbulent conditions with winds blowing from the east. To better understand the wind direction, the pilot performed a circling maneuver around the runway. During this observation, the movement of trees lining the north side of the runway indicated that the wind was blowing down the runway from the east.
As the pilot proceeded with the landing, the aircraft experienced a sudden yaw to the left just after passing the tree line during the landing roll. In an attempt to maintain directional control, the pilot corrected the movement, but the aircraft then yawed to the right. Despite the application of full left rudder and braking action, the airplane ground looped, resulting in substantial damage to the aircraft.