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

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

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

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

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

The expected rate of temperature decrease in an adiabatically rising air parcel when there is no heat exchange with the environment....

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...