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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 thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

The branch of science dealing with the laws of motion of air or other gases.

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...

The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

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

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.