Stop in for a cup of coffee

toolmanmike said
The velocity maps are cool. They can show rotation.

View attachment 1715061742 View attachment 1715061743

Yep, Doppler effect.

Doppler radar can pick up rotation easily as it responds to the changes in vector velocity and maps it. 3D Doppler radar can also show rotation in both the horizontal and vertical planes as well as shear effects. That's part of how they detect hail.