Supercells

Most dangerous because of
strong winds, hail and long-lived or multiple tornadoes.
A single supercell can last several hours. The updraft has a continuous feed of inflow air.
Wind shear vector turns clockwise (veers) with height in the boundary layer.
Propagation is continuous rather than discreet. The storm usually travels slower and to the right of the mean wind.
Research found average maximum size of multicell hailstone of 1.9 cm, while supercell is 5.3 cm. Average hail swath is 10 km and 20.2 km for the multicell and supercell storms, respectively.
The supercell is a preferential organization resulting from an intense, moist, convective updraft and atmospheric physics governing such processes.