Background
The pilot was preparing for departure. The airport manager informed him of an impending frontal passage with associated thunderstorms. Additionally, approach control advised the pilot to remain on the ground until after the frontal passage had occurred.
Events
Despite the warnings, the pilot elected to take off. During the flight, the aircraft encountered a thunderstorm with heavy rain and lightning. The aircraft subsequently collided with trees. The pilot was not instrument rated.
Investigation
Investigators found no mechanical malfunctions with the aircraft. The pilot's decision to take off after being explicitly warned by both the airport manager and air traffic control was noted. The pilot lacked an instrument rating, which would have been necessary for navigating in the adverse weather conditions encountered.