Dark blue cloudy sky

What is Cumulonimbus?

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe weather like hail or tornadoes.

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Glossary

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

A large body of air having similar horizontal temperature and moisture characteristics.

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

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

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