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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 lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

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...

Snow that rises to 8 feet or higher.

Weather intelligence is technology that provides predictive and actionable insights, allowing businesses to adapt to weather-related...

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

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

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...