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

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

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

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

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

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

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

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.