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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 line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...

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

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

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

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

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