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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

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

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

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

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...