Another GREAT picture I forgot was in my phone. This was sent to me by an ex-gf a while back and I just never posted it. This is a dirt devil, very common in the desert regions. It's essentially a mini tornado.
On my way out to Arizona I ran into a LOT of them in New Mexico.
If you're ever caught in one, pull over! I got caught in one and you literally go to zero visibility in a couple of seconds. Be safe y'all!