What is Hail?
Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.
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Contact UsGlossary
A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.
A mass of very cold, dry air that mostly originates over the Arctic Ocean.
A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.
The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.
A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...
Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...
A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.
Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....
Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.