On 10/21/2007 11:44 AM, Everett M. Greene wrote the following:
Does the lapse rate equation hold in all cases?
Don't count on it in the real world. I was once in the clear at 6,000 feet, 0
degrees C, and confidently told my wife that Approach would soon drop us into
the clouds at 4,000 feet but that we didn't have to worry about ice because it
would be +4 degrees. When we got there it was -- ta da -- 0 degrees! We
immediately started picking up some light ice, requested and got a descent to
3,000, and all was well.