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Thread: Formula for calculating the cloudbase from the Temp and Dewpt
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Old 3rd July 2007 | 04:52
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Dan Winterland
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Joined: Jun 2001
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From: Blighty
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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