Here is video of the Gustnado that occurred on Friday evening in Swan Quarter with top winds of 80 MPH.
A gustnado is a rotating column of air in contact with the ground but NOT extending from a thunderstorm cloud (see both pictures for an explanation). These often form on the leading edge of stronger winds well ahead of the actual thunderstorm itself. The key to this survey was multiple videos and eyewitness accounts that all showed or stated the rotation started from the ground up and for a large period of time was not connected to any cloud base. While other videos showed a connection to the cloud base this was later in the evolution of the gustnado and after it had originally formed from the ground up and continued to lift upward toward the cloud base.
A gustnado is a small, whirlwind which forms as an eddy in thunderstorm outflows. They do not connect with any cloud-base rotation and are not tornadoes. Since their origin is associated with cumuliform clouds, gustnadoes will be classified as Thunderstorm Wind events. Like dust devils, some stronger gustnadoes can cause damage.