Dark blue cloudy sky

What is Cirrostratus?

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky white, fibrous or vein-like.

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Glossary

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

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

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

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

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...