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

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

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

A large body of air having similar horizontal temperature and moisture characteristics.

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...

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

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

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

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