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.
Glossary
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...
An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...
A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.
Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...
A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...
A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.
An instrument for measuring atmospheric pressure.
A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...
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