Use this as a guide, with a goal of just "eyeballing" supercell motion when you become proficient. It is also very useful to overlay the forecast supercell motion with radar data, as will be shown in later examples. [Take time to go through this.] (1) Explain how the shear vector (hodograph-relative) is different from the mean wind vector (ground-relative). (2) Note the difference between "ground-relative" motion and "shear-relative" motion. Shear-relative motion will be the general convection throughout the rest of the presentation.