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

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

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

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

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

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

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

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

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

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