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

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

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

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

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

Indicates the amount of water the soil can absorb/retain through percolation. This capacity is around 7% in sandy soil and...

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

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

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...