In general, air moving up a mountain(upsloping) cools and condenses and thus will ring out more precipitation. The opposite is true also. Air moving down the mountain will warm and dry so to answer your question, the most moisture should be found just before the top of mountain ranges. Franconia Notch is a great example. I have watched for 30 years this same effect and how it has but the brakes on for snowfall at the top of the notch(Cannon Mt). The downsloping air can have a dramatic decrease in snowfall as one heads down to Franconia at 800ft+or- lower in elevation.
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SIKSUKR
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