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

An instrument for measuring atmospheric pressure.

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

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

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...