Background
A private pilot with 128 hours of flight time, who was not instrument rated, was conducting a personal night cross-country VFR flight over mountainous terrain.
Flight Sequence
During the flight, air traffic control (ATC) informed the pilot that VIP level 3 and 4 thunderstorms were positioned across the intended flight path. The pilot acknowledged the advisory and continued the flight. Shortly thereafter, radio and radar contact with the aircraft were lost.
Examination
Subsequent examination of the wreckage revealed that the aircraft had experienced an in-flight breakup. All structural failures exhibited overstress signatures typical of overload. There was no evidence of any pre-breakup mechanical malfunction or failure.
A meteorological summary of the accident site indicated that the leading edge of a weather echo of at least moderate intensity, containing at least a moderate rain shower, was located in the vicinity of the accident site.