The 'ground speed' slider controls the motion over land of the main circulation The 'subvortex size' slider controls the width of the subverted and the width of the ground scouring/path Press H to toggle the subvortex's path within the main circulation.
Simulation for the cycloidal marks of ground scouring left by strong subvortices in an intense multivortex tornado. Ideally, the 'ground speed' slider would be replaced by a 'wind speed' slider for the speed around the main circulation as it has a much more common impact, but it's much harder to make an equation for and to code.
