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

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

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

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

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

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

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

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

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...