This was the best storm I saw all of 2013 in Arizona. At the very least it was in the top 2. The low shelf cloud that appeared out of the rain was an amazing surprise, but there was also blowing dust and crazy lightning strikes. You can see the other shots from this cell right here.
I captured this one using a Nero Lightning Trigger...although I wouldn't recommend one. I was actually surprised I got this because I had a lot of bad luck with it, loose cables and eventually it just stopped working. I recently picked up a Lightning Trigger IV and am looking forward to that this spring and summer.
The fun part of this strike is that it's VERY close. A lot closer than it looks. 17mm lens on a full frame sensor...and it almost takes up the entire field of view. Not only that, but in the picture on my blog (http://www.mikeolbinski.com/theblog/2014/04/squiggly/), you can see the orange spot where the lightning strike hits the tree line...and that tree line was about 1/4 mile away from me if that.
A fairly unusual looking bolt as well...almost looks like a squiggly line, not the jagged strikes you usually see.