Dark blue cloudy sky

What is Barograph?

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates a visual record on a paper chart.

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Glossary

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

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

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A type of cloud consisting mostly of small particles such as ice particles.

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

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...