Selasa, 23 Oktober 2012

2012 October 23: Mammatus Clouds Over Saskatchewan

See Explanation.  Clicking on the picture will download 
the highest resolution version available.

Image Credit & LicenceCraig Lindsay, Wikipedia

Explanation: Normal cloud bottoms are flat. This is because moist warm air that rises and cools will condense into water droplets at a specific temperature, which usually corresponds to a very specific height. As water droplets grow, an opaque cloud forms. Under some conditions, however, cloud pockets can develop that contain large droplets of water or ice that fall into clear air as they evaporate. Such pockets may occur in turbulent air near a thunderstorm. Resulting mammatus clouds can appear especially dramaticif sunlit from the side. These mammatus clouds were photographed over Regina, SaskatchewanCanada during the past summer.

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