I was by an Arizona Monsoon storm last week as I was driving home from work. When I left, it was just super big thunderheads which in 10 minutes was followed by: the dust storm from hell, sprinkles, pouring rain, hail,and massive street flooding, car accidents galore on the roads, and lots of trees and electrical poles downed.
I was lucky to make it home okay but it was REALLY COOL to be in it (I'm a sick puppy with a death wish I guess).