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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 towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...