Dark blue cloudy sky

What is Cumulus?

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds under the right conditions.

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Glossary

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

The branch of science dealing with the laws of motion of air or other gases.

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

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

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

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

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...