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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 tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

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

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.