Haboob is the official name given to this phenomenon we experienced in Arizona Tuesday evening. I'm still picking dirt boogers out of my nose.
[youtube]http://www.youtube.com/watch?v=uL0uJkC0avQ&feature=player_embedded[/youtube]
[youtube]http://www.youtube.com/watch?v=uL0uJkC0avQ&feature=player_embedded[/youtube]