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Thread: Formula for calculating the cloudbase from the Temp and Dewpt
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Old 3rd Jul 2007, 04:52
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Dan Winterland
 
Join Date: Jun 2001
Location: Blighty
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400' per degree of spread is a reasonable rule of thumb in temperate climates, i.e it is only really valid if the temp is approximate to ISA. Even then there can be big variences. In tropical or very cold conditions, it doesn't work.
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