Going to or contacting the Bureau may be helpful but first, I would go chat with people who own farms along the path. They may have images or even video or recollections. Just get some idea from them that you are doing a case study on the storm. I would get them to describe what they saw first and without hints and then perhaps after several questions ask them if they saw any funnels, noise, etc. Ask them did they take any picturesor video of the storm, or if any interesting features and obviously of the aftermath.
I have done this in the past for other tornadoes with mixed results.