The haboob phenomenon affects Phoenix during the months of June through September which is Arizona’s monsoon season.
Wow – impressive!
I’ve seen photos of these in the Middle East, but I wasn’t aware that Arizona had them as well.
Happens is western Australia too http://www.washingtonpost.com/rf/image_606w/WashingtonPost/Content/Blogs/capital-weather-gang/201301/images/levi-cooper.jpg?uuid=qthlnFtZEeKI0MTPZcOtFQ