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air mass

A large body of air where temperature and moisture content are constant throughout


The boundary between air masses of different densities and usually different temperatures


An area in the atmosphere that has lower pressure than the surrounding areas and has winds that sprial toward the center


The rotation of air around a high-pressure center in the direction opposite to the Earth's rotation


A usually brief heavy storm that consists of rain, strong winds, lighting and thunder


An electric discharge that takes place between two oppositely charged surfaces, such as between a cloud and the ground, between two clouds or between two parts of the same cloud


The sound caused by the rapid expansion of air along an electrical strike


destructive, rotating column of air that has very high wind speeds, is visible as a funnel shaped cloud, and touches the ground


A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center

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