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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

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...