Dark blue cloudy sky

What is Kelvin Helmholtz?

Perhaps you have come across them, maybe you are seeing them for the first time. These clouds, known as wave clouds, resemble ocean waves rolling at equal intervals and are one of the rare types. It is believed that these clouds with their mesmerizing appearance inspired the swirls we see in Vincent Van Gogh's painting "Starry Night." So, how does this type of cloud form? They arise when two different layers of air in our atmosphere move at different speeds and occur when there is a strong vertical shear between the two air currents, causing the winds to blow faster at upper levels than at lower levels.

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Glossary

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

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

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

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 rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

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

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

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

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