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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 closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

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

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...