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

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

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

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

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

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

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

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

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