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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

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

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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

Local winds that blow from slopes to peaks as a result of the heating of the top slopes without being affected by general...

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

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

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...