Dark blue cloudy sky

What is Alto?

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus and altocumulus. These clouds are often associated with changing weather patterns.

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Glossary

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

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

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

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

Snow that rises to 8 feet or higher.

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

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