I've seen this in Phoenix too. Maybe not quite as big, but it sure felt like it when you're watching it come at you. A giant wall of dirt.
- Fa La La La Lindsay
Grew up in Muscat, Oman. Have been in these massive sand storms a few times when my dad used to take me on his plant inspections in the dessert. [Edit] They are not as frightening as they look.
- Kamath (नमः)
Kamath - it sure _looks_ horrifying, from the picture. Wow.
- Rick Cogley