
A nephanalaysis is the analysis of a synoptic chart focusing on the types and amount of clouds and precipitation. A nephanalysis can be used to avoid hazardous weather areas, by ships preparing routes for cruises, and to locate good fishing areas. This technique is rarely performed nowadays, due to the prevalence of satellite imagery worldwide. .....
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http://en.wikipedia.org/wiki/Nephanalysis

nephanalysis In meteorology, an analysis of the types and amount of clouds and precipitation on a synoptic chart in which cloud systems are identified as entities in relation to the pressure pattern and fronts.
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http://www.wordinfo.info/words/index/info/view_unit/1384/

a map or chart showing the distribution of types and amounts of clouds and precipitation at a given time. · the preparation of such a map or chart.
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https://www.infoplease.com/dictionary/nephanalysis
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