Dark blue cloudy sky

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 percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

A cloud of irregular appearance, composed of irregular cloud fragments.

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

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

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

Snow that rises to 8 feet or higher.

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...