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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

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

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

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

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

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

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