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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A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....
In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...
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 core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...
The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...
A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...
A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...