Dark blue cloudy sky

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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Glossary

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

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

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

A scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...