This is the longest example, and is intended to show how storm motion can be calculated and monitored. Continuous propagation - supercell moves in a more or less steady-state fashion. Discrete propagation - supercell moves in a discontinuous fashion (daughter cells…multicell model). Quasi-discrete or quasi-continuous propagation - supercell moves as an individual entity, but cells feed the main storm (feeder cells). Use cell motion for storm-relative calculations.