What happened
Prior to takeoff, the pilot received a comprehensive weather briefing that detailed various meteorological hazards, including SIGMET and AIRMET advisories, convective outlooks, and radar summaries. The forecast for the flight area indicated overcast ceilings at 1,500 feet MSL, visibility between 3 and 5 miles, and the presence of isolated thunderstorms with cloud tops reaching 35,000 feet MSL. After departing, the pilot established communication with air traffic control, and the aircraft was tracked on radar moving toward its intended destination.
Radar analysis determined that approximately four minutes into the flight, the aircraft encountered developing rain showers and vertical updrafts. During this encounter, the aircraft performed a descending right turn, followed by a brief climb and a subsequent descent. The aircraft's ground speed decreased significantly, dropping from 200 knots to 110 knots, before radar tracking ceased while the aircraft was at 4,500 feet MSL. An eyewitness reported hearing the aircraft but could not see it through the low cloud layer; however, they observed the aircraft exiting the clouds in a spin immediately before it struck the ground. There were 0 fatalities reported in the provided text.
Findings
Post-accident inspections of the aircraft revealed no mechanical deficiencies that would have prevented the engine or the airframe from operating normally. The investigation identified the encounter with developing rain showers and vertical updrafts as the primary event preceding the loss of control.