A viewer caught on camera what appears to be a gustnado in Pinal County on Monday.
Check out the See It, Snap It, Send It below.
A gustnado may look like a tornado, but it forms a bit differently.
A tornado forms in the updraft of a supercell thunderstorm and is attached to the base of the cloud.
Plus the vortex that creates a tornado drops down from the cloud.
This vortex is first called a funnel cloud then a tornado when it makes contact with the ground.
A gustnado is formed from the gusty outflow of a powerful thunderstorm.
The outflow can kick up air ahead of the storm and some of that air can then start rotating to form a small vortex.
Notice that the gustnado in the picture below is not attached to the base of the cloud but out ahead of the storm.
A gustnado is independent of the storm cloud and forms from the surface of the Earth, stretching upward, which is similar to a dust devil.
Gustnadoes are generally weak but can match the strength of an EF 0 or EF 1 tornado with 60 to 80 MPH winds.