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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

The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...

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

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

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

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....