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What is Black Ice?

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt due to its transparency, thus posing a danger to drivers.

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Glossary

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

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

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

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...