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What is La Niña?

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global weather patterns such as reduced rainfall in some areas and increased rainfall in others.

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Glossary

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

An instrument for measuring atmospheric pressure.

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...