I have seen those in Arizona before, they're call dust devils. Not too sure how they occur but they are not as strong as a tornado but they can do some damage. They occur and disappear sometimes as quickly as they form.
I have seen those in Arizona before, they're call dust devils. Not too sure how they occur but they are not as strong as a tornado but they can do some damage. They occur and disappear sometimes as quickly as they form. That was a pretty big one though.