Sharing this incredible storm with the few people who are left in the evening, watching these storms from about 50 miles away or more. A lot of people will comment that it is dangerous, as there was lightning, but we were so far away that we didn't hear the thunder from these storms. I saw 4-5 storms simultaneously at one point, and was in total awe at nature's majestic light show. I strongly recommend it if you have the chance and are around this area during the summer monsoon season.
Don't go in when the sun goes down. Also, the Grand Canyon is a great place to see the Milky Way or the stars at night. If you wish to see the Milky Way, go during the summer when the moon is not out, and look south to see the thickest part, the galactic core. You could go to the North Rim, but looking south is quite possible at the South Rim as well.