qPositive charges in the upper portions of the cloud; Negatively
charges in lower portions; Small packet of positive charges in the cloud base.
qLighting occurs in only in clouds that extend above the freezing level è charge separation is related to ice
crystals.
qLighter crystals collide with heavy hailstones in the
cloud.
qThe lighter crystals are positively charged and move to upper portions of the
cloud.
qThe heavy hail stones are negatively charged and move to the lower portion of the
cloud.