Large cumulonimbus clouds may extend to over 18,000 metres and be topped with anvil-shaped ice clouds. In the Northern Hemisphere, this flow is counter-clockwise as seen from above. Also, any rotation in the direction of the Earth's rotation. A hygrometer used to determine the dew point temperature directly. Ice crystals glittered like diamonds in sun, moon or artificial light.
Individual crystals appear to float in the air.
Term often used to describe fall of ice crystals from apparently clear sky. The flow of the wind resulting in a horizontal outflow of air from a region. The opposite of divergence is convergence . When the rapidly descending air strikes the ground, it spreads outward in all directions in a circle, like a fast-running faucet hitting the sink bottom. All Rights Reserved.