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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 line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

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

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.