It’s a haboob, and Phoenix gets them. We do to in Albuquerque. It’s not unique or even strange for the desert southwest.
Haboob?...sounds like something Xho Bhi Den would say
But why would a dust storm happen right after monsoon rains?
One would think that the ground would be at least damp.
Guess not.
I've got a photo somewhere in my collection of two of them coming to together from north and south just east of MCAS Yuma. I took it back in 1988/89 from the forth story of one of the barracks on the air station. Very cool picture; probably one of the best I ever took.