Evidence that may be used to prove that weather conditions were the cause of a truck accident in Johnstown can include documenting the location of debris on the roadway itself. Individuals might also use certified weather reports to prove what the weather conditions were at that time. Certified weather reports show temperature, the amount of precipitation, and the timing of the precipitation. Additionally, an experienced truck wreck attorney will hire the appropriate expert witnesses such as engineers that are qualified to reconstruct how a collision occurred.