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

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

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

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...