It might have been in or near the lake at this time, or close to the shore. For that reason I'm not sure if the material coming up from the ground is spray or dirt. Second funnel forms to the right and is lifting a little debris. Circulation on the surface is obviously not strong, but the rotation and up motion in the funnel dramatic during this event. The circulation if not in the lake is moving over wet ground .
Strong rotation becomes organized to the right of the funnel and is kicking up some dirt or spray.
A sharper funnel is in place at this time. The tornado continues is on the ground behind the hill. Shortly after this image the tornado begin to lift and dissipate .