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

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

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

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

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

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

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

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

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