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A destructive, rotating column of air that has very high wind speeds, is visible as a funnel shaped cloud and touches the ground. |
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An instrument that measures and indicates temperature. |
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The state of the atmosphere including temperature, humidity, precipitation and visibility. |
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Where warm air moves over cold, denser air. |
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A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiralin toward the intensely low-pressure storm center. |
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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. |
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The sound caused by the rapid expansion of air along an electrical strike. |
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A usually brief, heavy strom that consists of rain, strong winds, lightning, and thunder. |
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An instrument that measures atmospheric pressure. |
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The average weather conditions in an area over a long period of time. Useful for weather forcasting. |
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The distance north or south from the equator; expressed in degrees. |
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| Winds that blow mainly from one direction during a given period. |
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| The height of an object above sea level. |
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A horizontal movement of ocean water that is caused by wind and that occurs at or near the oceans surface. |
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| The amount of water vapor in the air. |
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The change of state from a gas to a liquid. |
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A collection of small water droplets or ice crystals suspended in the air, which forms when the air is cooled and condensation occurs. |
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| Any form of water that falls to the Earth's Surface from the clouds. |
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| A large body of air where temperature and moisture content are constant throughout. |
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| An area in the atmosphere that has lower pressure than the surrounding areas and has winds that spiral toward the center. |
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| A narrow belt of strong winds that blow in the upper troposphere. |
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A gradual increase in average global temperature. |
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| The warming of the surface and lower atmosphere of Earth that occurs when water vapor, carbon dioxide, and other gases absorb and reradiate thermal energy. |
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| The apparent curving of the path of a moving object from an otherwise straight path due to the Earth's rotation. |
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Prevailing winds that blow from east to west between 60 degrees and 90 degrees latitude in both hemispheres. |
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| Prevailing winds that blow from west to east between 30 degrees and 60 degrees latitude in both hemispheres. |
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| Prevailing winds that blow northeast from 30 degrees north latitude to the equator and that blow southeast from 30 degrees south latitude to the equator. |
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| The boundary between air masses of different densities and usually different temperatures. |
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| A large region characterized by a specific type of climate and certain types of plant and animal communities. |
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| An instrument used to measure wind speed. |
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| Forms over the polar regions; cold. |
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| Develops over the Tropics; warm. |
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| The temperature at which a gas condenses into a liquid. |
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| Forms when a cold air mass meets a warm air mass. Brings many days of cloudy, wet weather |
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| Forms when a warm air mass is caught between two colder air masses. Has cool temperatures and large amounts of rain and snow. |
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| The boundary that forms between warm and cold air masses. |
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| Forms where cold air moves under warm air, which is less dense, and pushes the warm air up. Move quickly and bring thunderstorms, heavy rain, or snow. |
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