I have done quite a bit of storm chasing before, and I have also been to Arizona before.   However, this is the first time I have combined the two together with the intent of photographing storms in Arizona.  Earlier this August, I joined David Kingham again for storm chasing across Northern Arizona and Southern Utah.  Some days produced storms, others didn't.  On the days when there were storms, I used a "Lightning Trigger" with my camera for the first time to help capture lightning, which can be quite a challenge to capture strikes in the daytime.  These triggers are designed to trip the shutter at exactly the right moment when electricity is detected.  With the help of this, I was able to capture several lightning images.  

Utah LightningLightning from the Dixie National Forest near Boulder, Utah

Point Imperial LightningStorm over Grand Canyon National Park.

There was more than just thunderstorms to shoot at the Grand Canyon.  Just after a storm left at Point Imperial (the highest viewpoint in Grand Canyon National Park) was an incredible moment.  Clouds were left hanging over the Canyon with a rainbow in the background!

After the storm at The Grand CanyonImperial Point Overlook. Grand Canyon National Park.