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What is Warning?

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening now, developing as we speak, and is minutes away. This weather hazard poses a threat to life and property.

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Glossary

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

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

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

The branch of science dealing with the laws of motion of air or other gases.

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

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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...