Dark blue cloudy sky

What is Frost?

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential damage to plants and crops.

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Glossary

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

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

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

A cloud of irregular appearance, composed of irregular cloud fragments.

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

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