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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 trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

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

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

A large body of air having similar horizontal temperature and moisture characteristics.

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

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

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...