cloud

Table of Contents

Introduction References & Edit History Related Topics

Images & Videos

View a time-lapse video of cloud formations rolling across the sky followed by a thunderstorm

How do clouds float?

Learn about the four main types of clouds formed at different altitudes

What is cloud seeding and can it be used to fight climate change?

cloud: cumulonimbus

lightning: cloud-to-ground

Middle clouds(Top to bottom) Altocumulus undulatus, a layer of shaded, regularly arranged rolls; altocumulus perlucidus, a white and gray layer in which there are spaces between the elements; altostratus translucidus, showing the Sun as if seen through ground glass; altocumulus radiatus, a layer with laminae arranged in parallel bands.

false-colour mosaic of the Great Red Spot

For Students

Read Next

Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.

16 Questions About Earth’s Atmsophere and Weather Answered

Hot-air balloon against a sky (clouds, hot air ballooning, recreation)

Why Is the Sky Blue?

Discover

Scottish fold cat. A genetic mutation caused (in the original cat-1961) the ears to bend forward and down.

Shorthair Cat Breeds

Four year old boy with grandfather and father lighting Hanukkah menorah. Photo taken on: December 21st, 2009

Which Is Correct: Hanukkah or Chanukah?

Watergate scandal. Richard M. Nixon. President Nixon gives a press conference and talks to the press, March 12, 1971.

9 American Political Scandals

Close-up of ostriches (Struthio camelus) necks and heads; location unknown.

6 of the World's Most Dangerous Birds

Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics

10 Best Hockey Players of All Time

Facsimile of one of William Henry Ireland's forgeries, a primitive self-portrait of William Shakespeare(tinted engraving). Published for Samuel Ireland, Norfolk Street, Strand, December 1, 1795. (W.H. Ireland, forgery)

The Time a Law Clerk Successfully Forged a New Shakespeare Play to Impress His Dad

Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society

The 10 Greatest Basketball Players of All Time

cloud: Media

meteorology

Videos

View a time-lapse video of cloud formations rolling across the sky followed by a thunderstorm

View a time-lapse video of cloud formations rolling across the sky followed by a thunderstorm

Time lapse of clouds followed by a thunderstorm.

Video: Encyclopædia Britannica, Inc.

How do clouds float?

How do clouds float?

How much does a cloud weigh?

Video: © American Chemical Society (A Britannica Publishing Partner)

Learn about the four main types of clouds formed at different altitudes

Learn about the four main types of clouds formed at different altitudes

Different types of clouds form at different altitudes.

Video: Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.com

What is cloud seeding and can it be used to fight climate change?

What is cloud seeding and can it be used to fight climate change?

Cloud seeding can produce an extra 5 to 15 percent of precipitation over the course...

Video: Encyclopædia Britannica, Inc.

Learn how the Sun warms moist air near the ground and causes it to rise and condense on dust particles

Learn how the Sun warms moist air near the ground and causes it to rise and condense on dust particles

Dust and other aerosols suspended in the atmosphere provide the surfaces upon which...

Video: Encyclopædia Britannica, Inc.

See how water transforms between liquid, ice, and vapour in the water cycle

See how water transforms between liquid, ice, and vapour in the water cycle

The formation of clouds and rain.

Video: Encyclopædia Britannica, Inc.

Understand the process and the factors involved in cloud formation

Understand the process and the factors involved in cloud formation

The process of cloud formation relies on several factors, including the rate of vaporization...

Video: © MinuteEarth (A Britannica Publishing Partner)

Learn about the water cycle and how oceans act as the Earth's water reservoirs

Learn about the water cycle and how oceans act as the Earth's water reservoirs

The water cycle begins and ends in the ocean.

Video: Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.com

The water cycle: From the ocean to the air

The water cycle: From the ocean to the air

Overview of water moving through the hydrologic cycle, or water cycle: it evaporates...

Video: Encyclopædia Britannica, Inc.

Discover how researchers sample clouds for acidity and pollution caused by industrial and automobile emissions

Discover how researchers sample clouds for acidity and pollution caused by industrial and automobile emissions

Sampling clouds for acidity at Whiteface Mountain, New York.

Video: Encyclopædia Britannica, Inc.

Images

cloud: cumulonimbus

cloud: cumulonimbus

Cumulonimbus clouds above a farm in Montana.

© Hemera/Thinkstock

lightning: cloud-to-ground

lightning: cloud-to-ground

Cloud-to-ground lightning discharge from a cumulonimbus cloud to a field.

© Hemera/Thinkstock

Sun

Sun

The Sun shining from behind clouds.

© Matthew Bowden/Fotolia

Middle clouds(Top to bottom) Altocumulus undulatus, a layer of shaded, regularly arranged rolls; altocumulus perlucidus, a white and gray layer in which there are spaces between the elements; altostratus translucidus, showing the Sun as if seen through ground glass; altocumulus radiatus, a layer with laminae arranged in parallel bands.

Middle clouds(Top to bottom) Altocumulus...

Richard Jepperson/Photo Researchers

cloud vortices

cloud vortices

Unique cloud vortices off the coast of Baja California, Mex., photographed from Skylab...

NASA

false-colour mosaic of the Great Red Spot

false-colour mosaic of the Great Red Spot

False-colour mosaic of two of the long-lived white ovals south of the Great Red Spot,...

Photo NASA/JPL/Caltech (NASA photo # PIA00857)

computer-generated visualization of Jupiter's equatorial cloud layers

computer-generated visualization of Jupiter's equatorial cloud layers

Computer-generated visualization of a portion of Jupiter's equatorial cloud layers,...

Photo NASA/JPL/Caltech (NASA photo # PIA01193)

Clouds on Mars. The rippled clouds (top) are high in Mars's atmosphere and consist mainly of water crystals with lesser amounts of frozen carbon dioxide. Fog is faintly visible in the lower half of the picture. This false-colour picture is a composite of images taken by the Mars Global Surveyor spacecraft on June 4, 1998.

Clouds on Mars. The rippled clouds (top) are high in Mars's atmosphere and consist...

Photo NASA/JPL/Caltech (NASA photo # PIA01436)

clouds on Neptune

clouds on Neptune

Clouds in Neptune's northern hemisphere, as observed by the Voyager 2 spacecraft...

NASA/JPL/Caltech

An enhanced photograph of Venus, obtained in February 1979 in ultraviolet light by the Pioneer Venus 1 spacecraft, shows the distinctive V-shaped cloud markings of the planet.

An enhanced photograph of Venus, obtained in February 1979 in ultraviolet light by...

Courtesy of L.D. Travis and W.B. Rossow

cloud types

cloud types

Different types of clouds form at different heights.

Encyclopædia Britannica, Inc.

Figure 5: Cross section of clouds and precipitation often found along the cross-sectional line in Figure 22D. The direction of frontal movement is indicated by the arrows.

Figure 5: Cross section of clouds and precipitation often found along the cross-sectional...

Encyclopædia Britannica, Inc.

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