A massive dust storm descended on the city of Phoenix, Arizona during the twilight hours on Tuesday, July 5. While not entirely uncommon this time of year, a dust storm (or haboob) of this size can be pretty startling to even the most seasoned residents of the Southwest. Day was temporarily turned to night as the storm swept across the city. An amazing time-lapse video of the event has been making its way around the Internet since Tuesday night. If you haven't seen it, check it out below: