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What is Precipitation?

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

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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...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

A very cold high pressure that originates over the Arctic Ocean.

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 mass of very cold, dry air that mostly originates over the Arctic Ocean.

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

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

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