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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 cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

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

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

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...