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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

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

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

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

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

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

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

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

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