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

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

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...

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

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.