Dark blue cloudy sky

What is Cirriform?

A type of cloud consisting mostly of small particles such as ice particles.

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Glossary

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

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

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

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

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

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

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

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