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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

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

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

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...