Dark blue cloudy sky

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

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

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

A cloud of irregular appearance, composed of irregular cloud fragments.

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

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

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

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...