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

Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...

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...

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

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

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

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

CONQ is a meteorological abbreviation for significant convection observed in a specific area, often indicating unstable atmospheric...

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...