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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

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which...

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...