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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 term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...

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

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

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

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

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