Meet the rare mammatus cloud! Facebooker Joe Nottage went an - TopicsExpress



          

Meet the rare mammatus cloud! Facebooker Joe Nottage went an internet crowd-sourcing search to find out what these strange formations were. Thanks to wonders of Twitter and some great weathermen, he got his answer. Via GrindTV: "Weather states that mammatus clouds are formed when ice crystals fall from the cumulonimbus cloud’s anvil. “The ice crystals sublimate, or change from ice to water vapor as they fall, causing the surrounding air to thermodynamically cool. The cooled air becomes negatively buoyant and begins to sink, producing the punched-out look indicative of the mammatus cloud.” Full article here: bit.ly/12JUbpx
Posted on: Tue, 23 Jul 2013 20:26:13 +0000

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