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

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

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

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

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

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

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

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...