The airplane sustained substantial damage when it impacted powerlines and terrain during takeoff at about 0920 Central time. A post-impact fire ensued. The pilot and two passengers sustained fatal injuries. Visual conditions prevailed and an IFR flight plan was filed. A pilot-rated witness observed the airplane take off. The witness stated a weather front was arriving at the airport and that strong winds from the northwest appeared to push the tail of the plane up and the nose down. The airplane descended and impacted powerlines and terrain. The airplanes engine was producing power until impact.
