Flight Details
A non-instrument rated pilot departed an airport with clear skies, aware of fog at the destination airport. The pilot stated that weather reports indicated clear sky conditions at the departure airport with areas of fog at the destination. Despite the possibility of fog, the pilot decided to attempt the flight with the intention of diverting to an alternate airport if conditions deteriorated.
Incident Sequence
While en route over mountainous terrain, the pilot observed fog encroaching the foothills near the destination airport. The pilot attempted to listen to the airport's automated weather observation system but could only discern the altimeter reading due to radio static. The pilot initiated a descent to the traffic pattern altitude and observed fog approaching the airport's perimeter.
As the airplane was on the final approach path, about 3 miles from the airport, visibility began to decrease. In an effort to maintain visual contact with the airport, the pilot maneuvered the airplane below a fog bank and elected to continue the approach. The airplane descended to about 500 feet agl and became surrounded by fog, resulting in the pilot losing visual reference. Shortly thereafter, the main landing gear touched down in a plowed field and the airplane rolled onto its right side.
Weather Conditions
Weather records revealed that at the time of the pilot's initial weather briefing, the destination airport was reporting instrument meteorological conditions. The accident occurred just before dusk. No other weather information was provided by the pilot.
Aircraft Damage
The airplane sustained substantial damage to the fuselage and the right wing. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.