Cumulonimbus hail storm cloud, computer artwork. Hail is a form of precipitation made up of balls of ice and snow. Hail forms in cumulonimbus clouds d

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Cumulonimbus hail storm cloud, computer artwork. Hail is a form of precipitation made up of balls of ice and snow. Hail forms in cumulonimbus clouds due to the violent convection currents present (blue and red arrows). Particles of rain or snow are drawn vertically up through the cloud, and collide with supercooled water and other particles. These collisions lead to the particles sticking together. When they become too heavy to be supported by the air currents, they fall to earth. Some hailstones can be over 10 centimetres across.

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Size: 3056px × 2875px
Photo credit: © GARY HINCKS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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