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LIGHTNING: noun; the flash of light produced when atmospheric electricity jumps

from one cloud to another cloud, or from a cloud to the ground

Ex. The storm didn't produce much rain but there was a lot of lightning

MATURE: adjective; fully developed

Ex. That tree is still young, when it is mature it will be at least 20 meters tall.
Ex. The cumulonimbus cloud of a mature thunderstorm may extend as high

as 50,000 feet.

POTENTIAL: noun; a possibility that can become an actual thing or happening

Ex. He has only had a few hours of flying lessons but I can see. that he has the
potential to become a good pilot.

POTENTIAL: adjective; capable of happening

Ex. The report advised the pilots that there were potential thunderstorms in the area.
POTENTIALLY: adverb form of potential

PREDOMINANT: adjective; main, primary or strongest characteristic or feature

Ex. The predominant feature of a thunderstorm is the vertical development of the
cumulus cloud.

PREDOMINATE: verb; to be the strongest feature

Ex. Although there are some downdrafts in this stage of the .storm,

updrafts predominate.

PROGRESS: verb; to move forward or to continue to develop
Ex. The front is expected to progress southward at about 15 miles per hour.

Ex. The cumulus cloud progressed into a cumulonimbus, then into a thunderstorm;

all in about 45 minutes.

ROLL CLOUD: noun; a ball-shaped cloud that sometimes forms at the

front edge of a thunderstorm

Ex. A roll cloud indicates severe turbulent conditions.

STAGE: noun; a step in a development, progress, or change
Ex. The first stage of every thunderstorm is a cumulus cloud.

TORNADO: noun; a destructive storm characterized by very high speed winds rotating in a
spiral cone-shaped pattern. The cone reaches to the ground and causes great damage.

Ex. A tornado went through part of the town and destroyed 400: houses.