Dark blue cloudy sky

What is Atmospheric River?

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

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Glossary

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

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

The branch of science dealing with the laws of motion of air or other gases.

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

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