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#5
November 24th 04, 02:37 AM
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"C Kingsbury" wrote in message ink.net... "Ash Wyllie" wrote in message ... Cloud base temps should be surfaceTemp - altinThousands * 2. But I could be wrong. It will be wrong when the lapse rate is different from standard, itself a significant indicator that something is afoot. When I read a METAR I often compare the observed ceiling to the surface temp to see if it's close to the 2C/1000 rule or not. If they're lower than they "should be" then you can bet there's a good chance of convection, turbulence, and generally fast-changing conditions. At least in New England this really only holds during the warmer months though. -cwk. Would you elaborate on this please? Are you talking about comparing the temp/dewpoint spread to the ceiling at 2C/1000? Cheers, John Clonts Temple, Texas N7NZ 
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