Dark blue cloudy sky

What is Trough?

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms and rain.

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Glossary

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

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

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

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

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

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

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