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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

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

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

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

A type of cloud consisting mostly of small particles such as ice particles.

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

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

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

Indicates the amount of water the soil can absorb/retain through percolation. This capacity is around 7% in sandy soil and...