What happened
The accident sequence began while the aircraft was established on final approach to runway 20. According to the instructor pilot, the glider encountered a combination of increasing headwinds and a sink condition during this phase of flight. These aerodynamic factors resulted in a noticeable loss of altitude.
Recognizing that the glider would not reach the runway threshold, the student pilot expressed doubt regarding the ability to complete the landing safely. In response to this situation, the instructor pilot assumed control of the glider. The instructor evaluated potential landing options and briefly considered diverting to an adjacent cow pasture but ultimately rejected this option. Instead, the instructor continued the approach toward runway 20.
Despite these efforts, the glider was unable to clear the obstacle. It collided with an airport perimeter fence located short of the runway threshold.