A detailed look at the track of the El Reno EF5 and its tragic impacts on several groups of chasers including Tim and Paul Samaras, Carl Young, Mike Bettes and crew, Brandon Sullivan, Brett Wright, and Dan Robinson. This analysis also includes time lapsed footage of the storm and tornado, synchronized to radar and GPS positions.
El Reno Tornado Analysis - Understanding a Chase Tragedy - YouTube
http://www.youtube.com/watch?v=jVTs55W3Iag