Thick fog hindered him .
His descent continued until Flight 1 hit ice - covered trees atop Cheat Mountain , about 40 miles ( 64 km ) south of Pittsburgh on the West Virginia line and near Uniontown , Pennsylvania .
Thick fog hindered him , and his descent continued until Flight 1 hit ice - covered trees atop Cheat Mountain , about 40 miles ( 64 km ) south of Pittsburgh on the West Virginia line and near Uniontown , Pennsylvania .