Dark blue cloudy sky

What is El Niño?

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global weather patterns, including increased rainfall in some regions and drought in others.

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Glossary

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

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

A type of cloud consisting mostly of small particles such as ice particles.

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

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

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

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

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...